A136559 - cp's OEIS frontend

A136559 G.f.: A(x) = Sum_{n>=0} arctanh( 2^(2n+1)*x )^(2n+1) / (2n+1)!; a power series in x with integer coefficients.

n	a(n)
1	2
2	0
3	88
4	0
5	285088
6	0
7	112173964160
8	0
9	6667221644498203136
10	0
11	66605167708510907980664608768
12	0
13	120169056821375322042225614651624227643392
14	0
15	41233460218449924405779202537032142206549563511026450432
16	0
17	2796406262888046560966728498782777223041570797904775508376399120263413760

[2, 0, 88, 0, 285088, 0, 112173964160, 0, 6667221644498203136, 0, 66605167708510907980664608768, 0, 120169056821375322042225614651624227643392, 0, 41233460218449924405779202537032142206549563511026450432, 0, 2796406262888046560966728498782777223041570797904775508376399120263413760]

cp's OEIS Frontend

A136559 G.f.: A(x) = Sum_{n>=0} arctanh( 2^(2n+1)*x )^(2n+1) / (2n+1)!; a power series in x with integer coefficients.

Table of values

List of values