A291730 - cp's OEIS frontend

A291730 p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = 1 - 2 S - 2 S^2.

n	a(n)
0	2
1	6
2	18
3	56
4	168
5	510
6	1544
7	4680
8	14176
9	42952
10	130128
11	394252
12	1194456
13	3618840
14	10963960
15	33217424
16	100638528
17	304903688
18	923764032
19	2798719872
20	8479257216
21	25689531840
22	77831351040
23	235804967056
24	714416256800
25	2164460716896
26	6557647800096

[2, 6, 18, 56, 168, 510, 1544, 4680, 14176, 42952, 130128, 394252, 1194456, 3618840, 10963960, 33217424, 100638528, 304903688, 923764032, 2798719872, 8479257216, 25689531840, 77831351040, 235804967056, 714416256800, 2164460716896, 6557647800096]

cp's OEIS Frontend

A291730 p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = 1 - 2 S - 2 S^2.

Table of values

List of values