A086500 - cp's OEIS frontend

A086500 Group the natural numbers such that the n-th group sum is divisible by the n-th triangular number: (1), (2, 3, 4), (5, 6, 7), (8, 9, 10, 11, 12), (13, 14, 15, 16, 17), (18, 19, 20, 21, 22, 23, 24), ... Sequence contains the group sum.

n	a(n)
1	1
2	9
3	18
4	50
5	75
6	147
7	196
8	324
9	405
10	605
11	726
12	1014
13	1183
14	1575
15	1800
16	2312
17	2601
18	3249
19	3610
20	4410
21	4851
22	5819
23	6348
24	7500
25	8125
26	9477
27	10206
28	11774
29	12615
30	14415
31	15376
32	17424
33	18513
34	20825
35	22050
36	24642
37	26011
38	28899
39	30420
40	33620
41	35301

[1, 9, 18, 50, 75, 147, 196, 324, 405, 605, 726, 1014, 1183, 1575, 1800, 2312, 2601, 3249, 3610, 4410, 4851, 5819, 6348, 7500, 8125, 9477, 10206, 11774, 12615, 14415, 15376, 17424, 18513, 20825, 22050, 24642, 26011, 28899, 30420, 33620, 35301]

cp's OEIS Frontend

A086500 Group the natural numbers such that the n-th group sum is divisible by the n-th triangular number: (1), (2, 3, 4), (5, 6, 7), (8, 9, 10, 11, 12), (13, 14, 15, 16, 17), (18, 19, 20, 21, 22, 23, 24), ... Sequence contains the group sum.

Table of values

List of values