A240958 - cp's OEIS frontend

A240958 G.f.: Sum_{n>=0} n^n * x^n * (1 + 2nx)^n / (1 + nx + 2n^2*x^2)^(n+1).

n	a(n)
0	1
1	1
2	4
3	30
4	296
5	3840
6	60480
7	1127280
8	24240384
9	590728320
10	16090099200
11	484387706880
12	15971308784640
13	572403619307520
14	22155942961152000
15	921115890645350400
16	40935834850710159360
17	1936630231160472207360
18	97172886828612884889600
19	5154401709528015200256000

[1, 1, 4, 30, 296, 3840, 60480, 1127280, 24240384, 590728320, 16090099200, 484387706880, 15971308784640, 572403619307520, 22155942961152000, 921115890645350400, 40935834850710159360, 1936630231160472207360, 97172886828612884889600, 5154401709528015200256000]

cp's OEIS Frontend

A240958 G.f.: Sum_{n>=0} n^n * x^n * (1 + 2nx)^n / (1 + nx + 2n^2*x^2)^(n+1).

Table of values

List of values

cp's OEIS Frontend

A240958 G.f.: Sum_{n>=0} n^n * x^n * (1 + 2*n*x)^n / (1 + n*x + 2*n^2*x^2)^(n+1).

Table of values

List of values

A240958 G.f.: Sum_{n>=0} n^n * x^n * (1 + 2nx)^n / (1 + nx + 2n^2*x^2)^(n+1).