A192377 - cp's OEIS frontend

A192377 Coefficient of x in the reduction by x^2->x+2 of the polynomial p(n,x) defined below in Comments.

n	a(n)
1	0
2	2
3	4
4	20
5	68
6	262
7	968
8	3624
9	13512
10	50442
11	188236
12	702524
13	2621836
14	9784846
15	36517520
16	136285264
17	508623504
18	1898208786
19	7084211604
20	26438637668
21	98670339028
22	368242718486
23	1374300534872
24	5128959421048
25	19141537149272
26	71437189176090

[0, 2, 4, 20, 68, 262, 968, 3624, 13512, 50442, 188236, 702524, 2621836, 9784846, 36517520, 136285264, 508623504, 1898208786, 7084211604, 26438637668, 98670339028, 368242718486, 1374300534872, 5128959421048, 19141537149272, 71437189176090]

cp's OEIS Frontend

A192377 Coefficient of x in the reduction by x^2->x+2 of the polynomial p(n,x) defined below in Comments.

Table of values

List of values