A291411 - cp's OEIS frontend

A291411 p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - 2 S - S^2 + S^3.

n	a(n)
0	2
1	7
2	21
3	63
4	189
5	567
6	1699
7	5092
8	15260
9	45731
10	137046
11	410697
12	1230768
13	3688339
14	11053134
15	33123790
16	99264648
17	297474121
18	891463923
19	2671519536
20	8005951162
21	23992058879
22	71898875923
23	215464974683
24	645700711159
25	1935021731510
26	5798830691535
27	17377808652745

[2, 7, 21, 63, 189, 567, 1699, 5092, 15260, 45731, 137046, 410697, 1230768, 3688339, 11053134, 33123790, 99264648, 297474121, 891463923, 2671519536, 8005951162, 23992058879, 71898875923, 215464974683, 645700711159, 1935021731510, 5798830691535, 17377808652745]

cp's OEIS Frontend

A291411 p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - 2 S - S^2 + S^3.

Table of values

List of values