A291005 - cp's OEIS frontend

A291005 p-INVERT of (1,1,1,1,1,...), where p(S) = 1 - 2 S - 2 S^3.

n	a(n)
0	2
1	6
2	20
3	68
4	230
5	774
6	2600
7	8732
8	29330
9	98526
10	330980
11	1111868
12	3735110
13	12547374
14	42150440
15	141596132
16	475664450
17	1597901526
18	5367837140
19	18032197268
20	60575633990
21	203491974774
22	683591422280
23	2296391457932
24	7714277207570
25	25914602943726
26	87055031555300

[2, 6, 20, 68, 230, 774, 2600, 8732, 29330, 98526, 330980, 1111868, 3735110, 12547374, 42150440, 141596132, 475664450, 1597901526, 5367837140, 18032197268, 60575633990, 203491974774, 683591422280, 2296391457932, 7714277207570, 25914602943726, 87055031555300]

cp's OEIS Frontend

A291005 p-INVERT of (1,1,1,1,1,...), where p(S) = 1 - 2 S - 2 S^3.

Table of values

List of values