A215890 - cp's OEIS frontend

A215890 E.g.f.: Shw(x) / Chw(x), where Chw(x) = Sum_{n>=0} (2n+1)^(2n-1) * x^(2n)/(2n)! and Shw(x) = Sum_{n>=0} (2n+2)^(2n) * x^(2n+1)/(2n+1)!, with zero coefficients omitted.

n	a(n)
1	1
2	7
3	461
4	84827
5	30648697
6	18319873199
7	16364889804485
8	20422587185959363
9	33936856584735107441
10	72442485189323515166807
11	193177550094285124372564285
12	629325007854898466696826469931
13	2459394825443160188158170494692841
14	11355850594904678701281528241280254207
15	61160283986030409241528644478489460162357
16	380011322281573634548774673447708463134715539

[1, 7, 461, 84827, 30648697, 18319873199, 16364889804485, 20422587185959363, 33936856584735107441, 72442485189323515166807, 193177550094285124372564285, 629325007854898466696826469931, 2459394825443160188158170494692841, 11355850594904678701281528241280254207, 61160283986030409241528644478489460162357, 380011322281573634548774673447708463134715539]

cp's OEIS Frontend

A215890 E.g.f.: Shw(x) / Chw(x), where Chw(x) = Sum_{n>=0} (2n+1)^(2n-1) * x^(2n)/(2n)! and Shw(x) = Sum_{n>=0} (2n+2)^(2n) * x^(2n+1)/(2n+1)!, with zero coefficients omitted.

Table of values

List of values

cp's OEIS Frontend

A215890 E.g.f.: Shw(x) / Chw(x), where Chw(x) = Sum_{n>=0} (2*n+1)^(2*n-1) * x^(2*n)/(2*n)! and Shw(x) = Sum_{n>=0} (2*n+2)^(2*n) * x^(2*n+1)/(2*n+1)!, with zero coefficients omitted.

Table of values

List of values

A215890 E.g.f.: Shw(x) / Chw(x), where Chw(x) = Sum_{n>=0} (2n+1)^(2n-1) * x^(2n)/(2n)! and Shw(x) = Sum_{n>=0} (2n+2)^(2n) * x^(2n+1)/(2n+1)!, with zero coefficients omitted.