Table 2: Maximum bounds with different and a = 0.9 (Example 4.2).

Methods 2 4 6 8 10 15

Song and Wang [12] 11 11 12 13 14 17
Zhang et al. [13] 11 12 13 14 16 19
Song et al. [14] 15 16 17 18 19 22
Wu et al. [16] 16 18 18 20 20 22
Theorem 3.118 18 19 20 20 23
Theorem 3.418 18 19 20 21 23