A291239 - cp's OEIS frontend

A291239 p-INVERT of (0,1,0,1,0,1,...), where p(S) = (1 - S^2) (1 - 2 S).

n	a(n)
0	2
1	5
2	12
3	31
4	74
5	184
6	442
7	1081
8	2604
9	6323
10	15250
11	36912
12	89074
13	215293
14	519660
15	1255223
16	3030106
17	7317032
18	17664170
19	42649553
20	102963276
21	248587051
22	600137378
23	1448890464
24	3497918306
25	8444802101
26	20387522508
27	49220043535
28	118827609578
29	286875776920

[2, 5, 12, 31, 74, 184, 442, 1081, 2604, 6323, 15250, 36912, 89074, 215293, 519660, 1255223, 3030106, 7317032, 17664170, 42649553, 102963276, 248587051, 600137378, 1448890464, 3497918306, 8444802101, 20387522508, 49220043535, 118827609578, 286875776920]

cp's OEIS Frontend

A291239 p-INVERT of (0,1,0,1,0,1,...), where p(S) = (1 - S^2) (1 - 2 S).

Table of values

List of values