A026522 - cp's OEIS frontend

A026522 a(n) = T(n, n-2), where T is given by A026519. Also number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 2.

n	a(n)
2	1
3	2
4	5
5	13
6	27
7	76
8	150
9	434
10	845
11	2470
12	4797
13	14085
14	27377
15	80584
16	156900
17	462620
18	902394
19	2664276
20	5205950
21	15387670
22	30114073
23	89097932
24	174609162
25	517058502
26	1014555607
27	3006637946
28	5906040623
29	17514547015
30	34438443075

[1, 2, 5, 13, 27, 76, 150, 434, 845, 2470, 4797, 14085, 27377, 80584, 156900, 462620, 902394, 2664276, 5205950, 15387670, 30114073, 89097932, 174609162, 517058502, 1014555607, 3006637946, 5906040623, 17514547015, 34438443075]

cp's OEIS Frontend

A026522 a(n) = T(n, n-2), where T is given by A026519. Also number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 2.

Table of values

List of values