A217042 - cp's OEIS frontend

A217042 G.f.: 1 = Sum_{n>=0} a(n) * x^n * Sum_{k=0..2n+1} binomial(2n+1,k)^2 * (-x)^k.

n	a(n)
0	1
1	1
2	9
3	216
4	9685
5	690129
6	71218224
7	10016312400
8	1839013713405
9	426795483514725
10	122096137679279577
11	42196285096882327872
12	17327812666870134181584
13	8338575020551966129589776
14	4647348123388957546230426120
15	2969504710005383652330487580832

[1, 1, 9, 216, 9685, 690129, 71218224, 10016312400, 1839013713405, 426795483514725, 122096137679279577, 42196285096882327872, 17327812666870134181584, 8338575020551966129589776, 4647348123388957546230426120, 2969504710005383652330487580832]

cp's OEIS Frontend

A217042 G.f.: 1 = Sum_{n>=0} a(n) * x^n * Sum_{k=0..2n+1} binomial(2n+1,k)^2 * (-x)^k.

Table of values

List of values

cp's OEIS Frontend

A217042 G.f.: 1 = Sum_{n>=0} a(n) * x^n * Sum_{k=0..2*n+1} binomial(2*n+1,k)^2 * (-x)^k.

Table of values

List of values

A217042 G.f.: 1 = Sum_{n>=0} a(n) * x^n * Sum_{k=0..2n+1} binomial(2n+1,k)^2 * (-x)^k.