A377123 - cp's OEIS frontend

A377123 Number of subsets of the first n nonzero triangular numbers whose sum is a nonzero triangular number.

n	a(n)
1	1
2	2
3	4
4	5
5	8
6	13
7	18
8	29
9	48
10	81
11	136
12	228
13	420
14	747
15	1326
16	2468
17	4520
18	8296
19	15232
20	28196
21	52504
22	96936
23	181699
24	340998
25	640091
26	1207386
27	2282956
28	4328536
29	8211989
30	15623003
31	29787092
32	56831499
33	108591159
34	207851120
35	398222781
36	763760138
37	1466661416
38	2819529654
39	5425826011
40	10450403468

[1, 2, 4, 5, 8, 13, 18, 29, 48, 81, 136, 228, 420, 747, 1326, 2468, 4520, 8296, 15232, 28196, 52504, 96936, 181699, 340998, 640091, 1207386, 2282956, 4328536, 8211989, 15623003, 29787092, 56831499, 108591159, 207851120, 398222781, 763760138, 1466661416, 2819529654, 5425826011, 10450403468]

cp's OEIS Frontend

A377123 Number of subsets of the first n nonzero triangular numbers whose sum is a nonzero triangular number.

Table of values

List of values