A203799 - cp's OEIS frontend

A203799 G.f.: Sum_{n>=0} (n-2x)^n x^n / (1 + nx - 2x^2)^n.

n	a(n)
0	1
1	1
2	1
3	8
4	48
5	312
6	2280
7	18720
8	171360
9	1733760
10	19232640
11	232243200
12	3033676800
13	42631142400
14	641383142400
15	10287038361600
16	175228365312000
17	3159341273088000
18	60111175348224000
19	1203646256676864000
20	25302180885037056000
21	557134559872450560000
22	12823826485099069440000

[1, 1, 1, 8, 48, 312, 2280, 18720, 171360, 1733760, 19232640, 232243200, 3033676800, 42631142400, 641383142400, 10287038361600, 175228365312000, 3159341273088000, 60111175348224000, 1203646256676864000, 25302180885037056000, 557134559872450560000, 12823826485099069440000]

cp's OEIS Frontend

A203799 G.f.: Sum_{n>=0} (n-2x)^n x^n / (1 + nx - 2x^2)^n.

Table of values

List of values

cp's OEIS Frontend

A203799 G.f.: Sum_{n>=0} (n-2*x)^n * x^n / (1 + n*x - 2*x^2)^n.

Table of values

List of values

A203799 G.f.: Sum_{n>=0} (n-2x)^n x^n / (1 + nx - 2x^2)^n.