A291255 - cp's OEIS frontend

A291255 p-INVERT of (0,1,0,1,0,1,...), where p(S) = (1 - S - 2 S^2)^2.

n	a(n)
0	2
1	7
2	18
3	55
4	144
5	404
6	1060
7	2853
8	7442
9	19573
10	50670
11	131368
12	337622
13	866819
14	2213650
15	5642899
16	14332988
17	36335548
18	91872760
19	231875713
20	584030738
21	1468631153
22	3686943130
23	9242753104
24	23138167146
25	57851432575
26	144470316562
27	360384852207
28	898051760168

[2, 7, 18, 55, 144, 404, 1060, 2853, 7442, 19573, 50670, 131368, 337622, 866819, 2213650, 5642899, 14332988, 36335548, 91872760, 231875713, 584030738, 1468631153, 3686943130, 9242753104, 23138167146, 57851432575, 144470316562, 360384852207, 898051760168]

cp's OEIS Frontend

A291255 p-INVERT of (0,1,0,1,0,1,...), where p(S) = (1 - S - 2 S^2)^2.

Table of values

List of values