Table 4 The numerical results for \(\pmb{t=0.25}\)

\(h^{0}-ex\)

3.600e − 2

1.240e − 2

4.286e − 3

1.490e − 3

5.202e − 4

1.823e − 4

6.405e − 5

\(r_{n}^{(0)}\)

2^1.5379

2^1.5326

2^1.5246

2^1.5178

2^1.5128

2^1.5091

\(h^{2}-ex\)

5.107e − 4

1.514e − 4

3.955e − 5

9.998e − 6

2.506e − 6

6.271e − 7

\(r_{n}^{(1)}\)

2^1.7538

2^1.9368

2^1.9840

2^1.9960

2^1.9990

\(h^{4}-ex\)

3.168e − 5

2.262e − 6

1.469e − 7

9.272e − 9

5.810e − 10

\(r_{n}^{(2)}\)

2^3.8081

2^3.9447

2^3.9855

2^3.9963