A069559 - cp's OEIS frontend

A069559 Triangular numbers in which the k-th significant digit either divides k or is a multiple of k.

n	a(n)
1	1
2	3
3	6
4	15
5	21
6	28
7	45
8	66
9	325
10	666
11	946
12	1128
13	1326
14	2145
15	2346
16	2628
17	2926
18	4186
19	8128
20	8385
21	8646
22	8911
23	11325
24	11628
25	14365
26	18145
27	18915
28	51681
29	52326
30	54615
31	54946
32	58311
33	111628
34	118341
35	152628
36	214185
37	258121
38	614386
39	1152921
40	1211346

[1, 3, 6, 15, 21, 28, 45, 66, 325, 666, 946, 1128, 1326, 2145, 2346, 2628, 2926, 4186, 8128, 8385, 8646, 8911, 11325, 11628, 14365, 18145, 18915, 51681, 52326, 54615, 54946, 58311, 111628, 118341, 152628, 214185, 258121, 614386, 1152921, 1211346]

cp's OEIS Frontend

A069559 Triangular numbers in which the k-th significant digit either divides k or is a multiple of k.

Table of values

List of values