A289809 - cp's OEIS frontend

A289809 p-INVERT of (1,2,1,3,1,4,1,5,...) (A133622), where p(S) = 1 - S - S^2.

n	a(n)
0	1
1	4
2	12
3	38
4	114
5	354
6	1076
7	3311
8	10120
9	31043
10	95044
11	291284
12	892242
13	2733804
14	8375092
15	25659298
16	78610859
17	240840496
18	737856017
19	2260561368
20	6925635380
21	21217961710
22	65005083598
23	199154984626
24	610147638720
25	1869298875531
26	5726938575936
27	17545523113507

[1, 4, 12, 38, 114, 354, 1076, 3311, 10120, 31043, 95044, 291284, 892242, 2733804, 8375092, 25659298, 78610859, 240840496, 737856017, 2260561368, 6925635380, 21217961710, 65005083598, 199154984626, 610147638720, 1869298875531, 5726938575936, 17545523113507]

cp's OEIS Frontend

A289809 p-INVERT of (1,2,1,3,1,4,1,5,...) (A133622), where p(S) = 1 - S - S^2.

Table of values

List of values