A152989 - cp's OEIS frontend

A152989 Sum of proper divisors minus the number of proper divisors of triangular number A000217(n).

n	a(n)
1	0
2	0
3	3
4	5
5	6
6	8
7	23
8	47
9	28
10	14
11	71
12	83
13	18
14	80
15	225
16	127
17	76
18	84
19	163
20	351
21	146
22	32
23	385
24	551
25	104
26	202
27	567
28	307
29	278
30	296
31	487
32	941
33	296
34	262
35	1219
36	805
37	54
38	372
39	1549
40	933
41	476
42	498
43	631
44	1795
45	826
46	68
47	1737
48	2221
49	534
50	946
51	1683
52	883
53	722
54	1380
55	2469
56	2861
57	740
58	86
59	2535

[0, 0, 3, 5, 6, 8, 23, 47, 28, 14, 71, 83, 18, 80, 225, 127, 76, 84, 163, 351, 146, 32, 385, 551, 104, 202, 567, 307, 278, 296, 487, 941, 296, 262, 1219, 805, 54, 372, 1549, 933, 476, 498, 631, 1795, 826, 68, 1737, 2221, 534, 946, 1683, 883, 722, 1380, 2469, 2861, 740, 86, 2535]

cp's OEIS Frontend

A152989 Sum of proper divisors minus the number of proper divisors of triangular number A000217(n).

Table of values

List of values