A026540 - cp's OEIS frontend

A026540 a(n) = T(n,n-3), T given by A026536. Also number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 3.

n	a(n)
3	1
4	2
5	6
6	16
7	36
8	104
9	215
10	635
11	1275
12	3786
13	7518
14	22344
15	44170
16	131264
17	259002
18	769578
19	1517418
20	4508580
21	8888495
22	26412001
23	52077234
24	154773696
25	305257251
26	907432695
27	1790353357
28	5323519838
29	10507386918
30	31251588060

[1, 2, 6, 16, 36, 104, 215, 635, 1275, 3786, 7518, 22344, 44170, 131264, 259002, 769578, 1517418, 4508580, 8888495, 26412001, 52077234, 154773696, 305257251, 907432695, 1790353357, 5323519838, 10507386918, 31251588060]

cp's OEIS Frontend

A026540 a(n) = T(n,n-3), T given by A026536. Also number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 3.

Table of values

List of values