A113035 - cp's OEIS frontend

A113035 Number of ways the set {1,2,...,n} can be split into two subsets of which the sum of one is twice the sum of the other.

n	a(n)
1	0
2	1
3	1
4	0
5	3
6	4
7	0
8	10
9	17
10	0
11	46
12	78
13	0
14	231
15	401
16	0
17	1233
18	2177
19	0
20	6869
21	12268
22	0
23	39502
24	71172
25	0
26	232686
27	422076
28	0
29	1396669
30	2547246
31	0
32	8512170
33	15593760
34	0
35	52534875
36	96598865
37	0
38	327669853
39	604405633
40	0
41	2062171364
42	3814087419
43	0
44	13078921499

[0, 1, 1, 0, 3, 4, 0, 10, 17, 0, 46, 78, 0, 231, 401, 0, 1233, 2177, 0, 6869, 12268, 0, 39502, 71172, 0, 232686, 422076, 0, 1396669, 2547246, 0, 8512170, 15593760, 0, 52534875, 96598865, 0, 327669853, 604405633, 0, 2062171364, 3814087419, 0, 13078921499]

cp's OEIS Frontend

A113035 Number of ways the set {1,2,...,n} can be split into two subsets of which the sum of one is twice the sum of the other.

Table of values

List of values