A069712 - cp's OEIS frontend

A069712 Triangular numbers with arithmetic mean of digits = integer (sum of digits = A multiple of the number of digits).

n	a(n)
0	1
1	3
2	6
3	15
4	28
5	55
6	66
7	91
8	105
9	120
10	153
11	171
12	210
13	231
14	276
15	300
16	351
17	378
18	435
19	465
20	528
21	561
22	630
23	666
24	741
25	780
26	861
27	903
28	990
29	1128
30	1326
31	1830
32	2145
33	2415
34	3081
35	5151
36	5995
37	6105
38	7140
39	8385
40	8646
41	9591
42	9870
43	10153
44	11026
45	11175
46	12246
47	12403

[1, 3, 6, 15, 28, 55, 66, 91, 105, 120, 153, 171, 210, 231, 276, 300, 351, 378, 435, 465, 528, 561, 630, 666, 741, 780, 861, 903, 990, 1128, 1326, 1830, 2145, 2415, 3081, 5151, 5995, 6105, 7140, 8385, 8646, 9591, 9870, 10153, 11026, 11175, 12246, 12403]

cp's OEIS Frontend

A069712 Triangular numbers with arithmetic mean of digits = integer (sum of digits = A multiple of the number of digits).

Table of values

List of values