A289807 - cp's OEIS frontend

A289807 p-INVERT of (1,2,2,3,3,4,4,...) (A080513), where p(S) = 1 - S - S^2.

n	a(n)
0	1
1	4
2	13
3	42
4	133
5	424
6	1348
7	4291
8	13653
9	43449
10	138261
11	439979
12	1400101
13	4455420
14	14178073
15	45117606
16	143573662
17	456881476
18	1453892534
19	4626590576
20	14722780217
21	46850970327
22	149089600359
23	474434334814
24	1509749422360
25	4804338875098
26	15288412556740

[1, 4, 13, 42, 133, 424, 1348, 4291, 13653, 43449, 138261, 439979, 1400101, 4455420, 14178073, 45117606, 143573662, 456881476, 1453892534, 4626590576, 14722780217, 46850970327, 149089600359, 474434334814, 1509749422360, 4804338875098, 15288412556740]

cp's OEIS Frontend

A289807 p-INVERT of (1,2,2,3,3,4,4,...) (A080513), where p(S) = 1 - S - S^2.

Table of values

List of values