A026523 - cp's OEIS frontend

A026523 a(n) = T(n, n-3), T given by A026519. Also a(n) = number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 3.

n	a(n)
3	1
4	2
5	8
6	16
7	52
8	104
9	319
10	635
11	1910
12	3786
13	11304
14	22344
15	66514
16	131264
17	390266
18	769578
19	2286996
20	4508580
21	13397075
22	26412001
23	78489235
24	154773696
25	460030947
26	907432695
27	2697786052
28	5323519838
29	15830906756
30	31251588060

[1, 2, 8, 16, 52, 104, 319, 635, 1910, 3786, 11304, 22344, 66514, 131264, 390266, 769578, 2286996, 4508580, 13397075, 26412001, 78489235, 154773696, 460030947, 907432695, 2697786052, 5323519838, 15830906756, 31251588060]

cp's OEIS Frontend

A026523 a(n) = T(n, n-3), T given by A026519. Also a(n) = number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 3.

Table of values

List of values