A118711 - cp's OEIS frontend

A118711 Integers k such that the k-th triangular number t_k has all its base-12 digits contained in {1,5,7,11}.

n	a(n)
1	1
2	13
3	61
4	82
5	898
6	2962
7	2989
8	9133
9	20077
10	20653
11	28669
12	29266
13	35581
14	35842
15	37501
16	99133
17	236674
18	286717
19	424621
20	424957
21	821698
22	941650
23	1704301
24	1722370
25	2978413
26	3328258
27	4494466
28	10022317
29	40392829
30	49870141
31	50668882
32	53933053

[1, 13, 61, 82, 898, 2962, 2989, 9133, 20077, 20653, 28669, 29266, 35581, 35842, 37501, 99133, 236674, 286717, 424621, 424957, 821698, 941650, 1704301, 1722370, 2978413, 3328258, 4494466, 10022317, 40392829, 49870141, 50668882, 53933053]

cp's OEIS Frontend

A118711 Integers k such that the k-th triangular number t_k has all its base-12 digits contained in {1,5,7,11}.

Table of values

List of values