A291403 - cp's OEIS frontend

A291403 p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - 2 S^2 - S^4.

n	a(n)
0	0
1	2
2	4
3	7
4	20
5	42
6	92
7	214
8	472
9	1062
10	2396
11	5361
12	12052
13	27074
14	60764
15	136497
16	306520
17	688292
18	1545768
19	3471224
20	7795184
21	17505588
22	39311608
23	88280985
24	198250312
25	445204610
26	999783508
27	2245185343
28	5041947516
29	11322557726
30	25426742788
31	57100105470

[0, 2, 4, 7, 20, 42, 92, 214, 472, 1062, 2396, 5361, 12052, 27074, 60764, 136497, 306520, 688292, 1545768, 3471224, 7795184, 17505588, 39311608, 88280985, 198250312, 445204610, 999783508, 2245185343, 5041947516, 11322557726, 25426742788, 57100105470]

cp's OEIS Frontend

A291403 p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - 2 S^2 - S^4.

Table of values

List of values