Table 1: Initial slope obtained by OHAM for different values of .

Hartree [16]Asaithambi [22]Asaithambi [21]Salama [39] Zhang [40] Vera [24]OHAM

21.6871.6872221.6872181.6872181.6872181.6872181.67054
11.2331.235891.2325881.2325881.2325871.2325871.23567
0.50.9270.9276820.9276800.9276800.9276800.9276800.92697
−0.10.3190.3192700.3192700.3192700.3192700.3192700.31927