A192431 - cp's OEIS frontend

A192431 Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.

n	a(n)
0	0
1	1
2	4
3	15
4	52
5	185
6	648
7	2287
8	8040
9	28321
10	99660
11	350879
12	1235036
13	4347705
14	15304208
15	53873695
16	189642192
17	667570433
18	2349942420
19	8272149359
20	29119170180
21	102503781241
22	360828342424
23	1270168882575
24	4471181087032
25	15739215003425

[0, 1, 4, 15, 52, 185, 648, 2287, 8040, 28321, 99660, 350879, 1235036, 4347705, 15304208, 53873695, 189642192, 667570433, 2349942420, 8272149359, 29119170180, 102503781241, 360828342424, 1270168882575, 4471181087032, 15739215003425]

cp's OEIS Frontend

A192431 Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.

Table of values

List of values