A157305 - cp's OEIS frontend

A157305 G.f. A(x) satisfies the condition that both A(x) and F(x) = A(x*F(x)^2) have zeros for every other coefficient after initial terms; dual sequence A157302 satisfies the same condition.

n	a(n)
0	1
1	1
2	-2
3	0
4	26
5	0
6	-1378
7	0
8	141202
9	0
10	-22716418
11	0
12	5218302090
13	0
14	-1619288968386
15	0
16	653379470919714
17	0
18	-333014944014777730
19	0
20	209463165121436380282
21	0
22	-159492000935562428176162
23	0
24	144654795258284936534929586
25	0

[1, 1, -2, 0, 26, 0, -1378, 0, 141202, 0, -22716418, 0, 5218302090, 0, -1619288968386, 0, 653379470919714, 0, -333014944014777730, 0, 209463165121436380282, 0, -159492000935562428176162, 0, 144654795258284936534929586, 0]

cp's OEIS Frontend

A157305 G.f. A(x) satisfies the condition that both A(x) and F(x) = A(x*F(x)^2) have zeros for every other coefficient after initial terms; dual sequence A157302 satisfies the same condition.

Table of values

List of values