A026520 - cp's OEIS frontend

A026520 a(n) = T(n,n), T given by A026519. Also a(n) = number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 0.

n	a(n)
0	1
1	1
2	2
3	4
4	8
5	20
6	38
7	104
8	196
9	556
10	1052
11	3032
12	5774
13	16778
14	32146
15	93872
16	180772
17	529684
18	1024256
19	3008864
20	5837908
21	17184188
22	33433996
23	98577712
24	192239854
25	567591142
26	1109049320
27	3278348608
28	6416509142
29	18986482250

[1, 1, 2, 4, 8, 20, 38, 104, 196, 556, 1052, 3032, 5774, 16778, 32146, 93872, 180772, 529684, 1024256, 3008864, 5837908, 17184188, 33433996, 98577712, 192239854, 567591142, 1109049320, 3278348608, 6416509142, 18986482250]

cp's OEIS Frontend

A026520 a(n) = T(n,n), T given by A026519. Also a(n) = number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 0.

Table of values

List of values