A291011 - cp's OEIS frontend

A291011 p-INVERT of (1,1,1,1,1,...), where p(S) = (1 - S)^2 * (1 - 2*S).

n	a(n)
0	4
1	15
2	52
3	172
4	552
5	1736
6	5384
7	16536
8	50440
9	153112
10	463176
11	1397720
12	4210568
13	12668568
14	38083528
15	114414424
16	343587336
17	1031482904
18	3095956040
19	9291013848
20	27879595144
21	83652416920
22	250985562312
23	753015407192
24	2259167856392
25	6777755227416
26	20333785775944

[4, 15, 52, 172, 552, 1736, 5384, 16536, 50440, 153112, 463176, 1397720, 4210568, 12668568, 38083528, 114414424, 343587336, 1031482904, 3095956040, 9291013848, 27879595144, 83652416920, 250985562312, 753015407192, 2259167856392, 6777755227416, 20333785775944]

cp's OEIS Frontend

A291011 p-INVERT of (1,1,1,1,1,...), where p(S) = (1 - S)^2 * (1 - 2*S).

Table of values

List of values