A212614 - cp's OEIS frontend

A212614 Least k > 1 such that the product tri(n) * tri(k) is triangular, or zero if no such k exists, where tri(k) is the k-th triangular number.

n	a(n)
1	2
2	5
3	3
4	6
5	2
6	4
7	10
8	0
9	13
10	7
11	5
12	4
13	9
14	3
15	20
16	208
17	185
18	14
19	5
20	2
21	6
22	14
23	12
24	115
25	55
26	37
27	748
28	11
29	12
30	1358
31	90
32	90
33	6
34	3
35	21
36	11
37	26
38	10
39	33
40	21
41	265
42	51
43	61
44	75
45	96
46	131
47	201
48	411
49	0
50	10
51	7
52	148
53	113
54	92
55	4
56	68
57	364
58	329
59	50
60	5083
61	43
62	329594
63	38
64	36
65	2414

[2, 5, 3, 6, 2, 4, 10, 0, 13, 7, 5, 4, 9, 3, 20, 208, 185, 14, 5, 2, 6, 14, 12, 115, 55, 37, 748, 11, 12, 1358, 90, 90, 6, 3, 21, 11, 26, 10, 33, 21, 265, 51, 61, 75, 96, 131, 201, 411, 0, 10, 7, 148, 113, 92, 4, 68, 364, 329, 50, 5083, 43, 329594, 38, 36, 2414]

cp's OEIS Frontend

A212614 Least k > 1 such that the product tri(n) * tri(k) is triangular, or zero if no such k exists, where tri(k) is the k-th triangular number.

Table of values

List of values