A291228 - cp's OEIS frontend

A291228 p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - 2 S - 2 S^2.

n	a(n)
0	2
1	6
2	18
3	56
4	170
5	522
6	1594
7	4880
8	14922
9	45654
10	139642
11	427176
12	1306690
13	3997146
14	12227058
15	37402144
16	114411538
17	349980390
18	1070575586
19	3274847512
20	10017625050
21	30643508586
22	93737246762
23	286738430256
24	877121205338
25	2683078129590
26	8207426973258

[2, 6, 18, 56, 170, 522, 1594, 4880, 14922, 45654, 139642, 427176, 1306690, 3997146, 12227058, 37402144, 114411538, 349980390, 1070575586, 3274847512, 10017625050, 30643508586, 93737246762, 286738430256, 877121205338, 2683078129590, 8207426973258]

cp's OEIS Frontend

A291228 p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - 2 S - 2 S^2.

Table of values

List of values