A026570 - cp's OEIS frontend

A026570 a(n) = A026568(n,n-1), also a(n) = number of integer strings s(0),...,s(n) counted by A026568 such that s(n)=1.

n	a(n)
1	1
2	1
3	4
4	7
5	20
6	43
7	111
8	259
9	648
10	1565
11	3885
12	9533
13	23662
14	58547
15	145630
16	362151
17	903110
18	2253615
19	5633359
20	14094035
21	35304658
22	88511733
23	222115782
24	557819793
25	1401987930
26	3526066273
27	8874034647
28	22346581133
29	56304982154

[1, 1, 4, 7, 20, 43, 111, 259, 648, 1565, 3885, 9533, 23662, 58547, 145630, 362151, 903110, 2253615, 5633359, 14094035, 35304658, 88511733, 222115782, 557819793, 1401987930, 3526066273, 8874034647, 22346581133, 56304982154]

cp's OEIS Frontend

A026570 a(n) = A026568(n,n-1), also a(n) = number of integer strings s(0),...,s(n) counted by A026568 such that s(n)=1.

Table of values

List of values