A374274 - cp's OEIS frontend

A374274 a(n) is the smallest number which can be represented as the sum of four distinct nonzero n-gonal numbers in exactly n ways, or -1 if no such number exists.

n	a(n)
3	47
4	142
5	344
6	652
7	834
8	1542
9	2263
10	3090
11	4792
12	4570
13	5844
14	8480
15	9571
16	10542
17	15892
18	18202
19	19587
20	23166
21	26732
22	32040
23	36371
24	39730
25	44709
26	52940
27	55141
28	60362
29	67705
30	79624
31	86906
32	89266
33	103591
34	116246
35	126610
36	131462
37	135324
38	148190
39	158152
40	162422
41	186126
42	200254

[47, 142, 344, 652, 834, 1542, 2263, 3090, 4792, 4570, 5844, 8480, 9571, 10542, 15892, 18202, 19587, 23166, 26732, 32040, 36371, 39730, 44709, 52940, 55141, 60362, 67705, 79624, 86906, 89266, 103591, 116246, 126610, 131462, 135324, 148190, 158152, 162422, 186126, 200254]

cp's OEIS Frontend

A374274 a(n) is the smallest number which can be represented as the sum of four distinct nonzero n-gonal numbers in exactly n ways, or -1 if no such number exists.

Table of values

List of values