A379337 - cp's OEIS frontend

A379337 Number of subsets of the first n nonzero n-gonal numbers whose sum is a nonzero n-gonal number.

n	a(n)
2	3
3	4
4	5
5	7
6	7
7	10
8	11
9	18
10	20
11	23
12	31
13	63
14	77
15	127
16	212
17	332
18	569
19	1034
20	1749
21	2961
22	5236
23	9319
24	16524
25	28583
26	53618
27	96310
28	174573
29	309344
30	584500
31	1077230
32	1984982
33	3532258
34	6791403
35	12564409
36	23445306
37	42349391
38	81321728
39	152375491
40	284898585
41	524549566
42	1006478176
43	1894215667

[3, 4, 5, 7, 7, 10, 11, 18, 20, 23, 31, 63, 77, 127, 212, 332, 569, 1034, 1749, 2961, 5236, 9319, 16524, 28583, 53618, 96310, 174573, 309344, 584500, 1077230, 1984982, 3532258, 6791403, 12564409, 23445306, 42349391, 81321728, 152375491, 284898585, 524549566, 1006478176, 1894215667]

cp's OEIS Frontend

A379337 Number of subsets of the first n nonzero n-gonal numbers whose sum is a nonzero n-gonal number.

Table of values

List of values