A290616 - cp's OEIS frontend

A290616 p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = 1 - 2 S - S^2.

n	a(n)
0	2
1	5
2	12
3	31
4	80
5	205
6	526
7	1350
8	3464
9	8889
10	22810
11	58532
12	150198
13	385420
14	989018
15	2537899
16	6512450
17	16711463
18	42882940
19	110041025
20	282373998
21	724594076
22	1859365870
23	4771280299
24	12243483684
25	31417750230
26	80620439004
27	206878440932
28	530866488090

[2, 5, 12, 31, 80, 205, 526, 1350, 3464, 8889, 22810, 58532, 150198, 385420, 989018, 2537899, 6512450, 16711463, 42882940, 110041025, 282373998, 724594076, 1859365870, 4771280299, 12243483684, 31417750230, 80620439004, 206878440932, 530866488090]

cp's OEIS Frontend

A290616 p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = 1 - 2 S - S^2.

Table of values

List of values