A188894 - cp's OEIS frontend

A188894 The index of the least n-gonal number greater than 1 that is also triangular, or 0 if none exists.

n	a(n)
3	2
4	6
5	12
6	2
7	5
8	3
9	10
10	2
11	0
12	5
13	3
14	15
15	2
16	3
17	6
18	0
19	11
20	6
21	2
22	35
23	3
24	4
25	6
26	12
27	3
28	2
29	10
30	7
31	8
32	63
33	4
34	5
35	285
36	2
37	20
38	0
39	6
40	15
41	3
42	8
43	9
44	99
45	2
46	6
47	18
48	5
49	15
50	30
51	6
52	3
53	21
54	19
55	2
56	9
57	10
58	3
59	6
60	7
61	5
62	621
63	14
64	21
65	42
66	2
67	55
68	28
69	4
70	725
71	3
72	10
73	11
74	195
75	7
76	8
77	460
78	2
79	14
80	6
81	28
82	56
83	10
84	4
85	36
86	2107

[2, 6, 12, 2, 5, 3, 10, 2, 0, 5, 3, 15, 2, 3, 6, 0, 11, 6, 2, 35, 3, 4, 6, 12, 3, 2, 10, 7, 8, 63, 4, 5, 285, 2, 20, 0, 6, 15, 3, 8, 9, 99, 2, 6, 18, 5, 15, 30, 6, 3, 21, 19, 2, 9, 10, 3, 6, 7, 5, 621, 14, 21, 42, 2, 55, 28, 4, 725, 3, 10, 11, 195, 7, 8, 460, 2, 14, 6, 28, 56, 10, 4, 36, 2107]

cp's OEIS Frontend

A188894 The index of the least n-gonal number greater than 1 that is also triangular, or 0 if none exists.

Table of values

List of values