A067991 - cp's OEIS frontend

A067991 a(n) = k such that the k-th triangular number is A068808(n).

n	a(n)
1	1
2	2
3	3
4	7
5	11
6	12
7	27
8	31
9	56
10	107
11	109
12	132
13	309
14	343
15	627
16	968
17	1332
18	1891
19	3129
20	3434
21	5291
22	5656
23	8831
24	13332
25	18972
26	19492
27	28248
28	37067
29	58309
30	107516
31	140547
32	278172
33	281743
34	368507
35	424256
36	774325
37	1247307
38	2788547
39	3126968
40	3660565
41	3949427
42	7732916

[1, 2, 3, 7, 11, 12, 27, 31, 56, 107, 109, 132, 309, 343, 627, 968, 1332, 1891, 3129, 3434, 5291, 5656, 8831, 13332, 18972, 19492, 28248, 37067, 58309, 107516, 140547, 278172, 281743, 368507, 424256, 774325, 1247307, 2788547, 3126968, 3660565, 3949427, 7732916]

cp's OEIS Frontend

A067991 a(n) = k such that the k-th triangular number is A068808(n).

Table of values

List of values