A192355 - cp's OEIS frontend

A192355 Constant term of the reduction of the polynomial p(n,x)=(1/2)((x+2)^n+(x-2)^n) by x^2->x+2.

n	a(n)
1	1
2	0
3	6
4	2
5	70
6	90
7	926
8	2002
9	13110
10	37130
11	194446
12	640002
13	2973350
14	10653370
15	46333566
16	174174002
17	730176790
18	2820264810
19	11582386286
20	45425564002
21	184414199430
22	729520967450
23	2942491360606
24	11696742970002
25	47006639297270
26	187367554937290

[1, 0, 6, 2, 70, 90, 926, 2002, 13110, 37130, 194446, 640002, 2973350, 10653370, 46333566, 174174002, 730176790, 2820264810, 11582386286, 45425564002, 184414199430, 729520967450, 2942491360606, 11696742970002, 47006639297270, 187367554937290]

cp's OEIS Frontend

A192355 Constant term of the reduction of the polynomial p(n,x)=(1/2)((x+2)^n+(x-2)^n) by x^2->x+2.

Table of values

List of values