Research Article | Open Access
Some Properties of a Sequence Similar to Generalized Euler Numbers
We introduce the sequence given by generating function and establish some explicit formulas for the sequence . Several identities involving the sequence , Stirling numbers, Euler polynomials, and the central factorial numbers are also presented.
1. Introduction and Definitions
For a real or complex parameter , the generalized Euler polynomials are defined by the following generating function (see [1–4]) Obviously, we have in terms of the classical Euler polynomials , being the set of positive integers. The classical Euler numbers are given by the following:
Clearly, for . The first few values of are shown below
The sequence is related to the classical Bernoulli polynomials (see [8–11]) and the classical Euler polynomials . Zhi-Hong Sun gets the generating function of and deduces many identities involving . As example, (see ),
Similarly, we can define the generalized sequence . For a real or complex parameter , the generalized sequence is defined by the following generating function: Obviously, By using (10), we can obtain
The main purpose of this paper is to prove some formulas for the generalized sequence and . Some identities involving the sequence , Stirling numbers , and the central factorial numbers are deduced.
2. Main Results
Theorem 1. Let and Then,
Taking in Theorem 1, we can obtain the following.
Corollary 3. Let . Then,
From Corollary 3, we may immediately deduce the following results.
Corollary 4. Let . Then,
Theorem 5. Let . Then,
Theorem 6. Let . Suppose also that is defined by (22). Then,
Theorem 7. Let . Then,
Theorem 8. Let . Then,
Theorem 9. Let . Then,
3. Proofs of Theorems
Proof of Theorem 5. By (10), we have and , thus By Theorem 1 and comparing the coefficient of on both sides of (35), we get Again, by taking in Theorem 1, we have By (36) and (37), we immediately obtain (27). This completes the proof of Theorem 5.
Proof of Theorem 6. By applying Theorem 1, we have On the other hand, it follows from (10) that By using (38) and (39), we find that We now note that Hence, yields Comparing the coefficient of on both sides of (43), we immediately get (28). This completes the proof of Theorem 6.
Proof of Theorem 8. By using (7), we have Thus That is, Comparing the coefficient of on both sides of (48), we get the following: By (49) we immediately obtain (30). This completes the proof of Theorem 8.
This work is partly supported by the Social Science Foundation (no. 2012YB03) of Huizhou University and the Key Discipline Foundation (no. JG2011019) of Huizhou University.
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Copyright © 2013 Haiqing Wang and Guodong Liu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.