A053807 - cp's OEIS frontend

A053807 a(n) = Sum_{k=1..n, n mod k = 1} k^2.

n	a(n)
1	0
2	0
3	4
4	9
5	20
6	25
7	49
8	49
9	84
10	90
11	129
12	121
13	209
14	169
15	249
16	259
17	340
18	289
19	454
20	361
21	545
22	499
23	609
24	529
25	849
26	650
27	849
28	819
29	1049
30	841
31	1299
32	961
33	1364
34	1219
35	1449
36	1299
37	1910
38	1369
39	1809
40	1699
41	2209
42	1681
43	2499
44	1849
45	2561
46	2365
47	2649

[0, 0, 4, 9, 20, 25, 49, 49, 84, 90, 129, 121, 209, 169, 249, 259, 340, 289, 454, 361, 545, 499, 609, 529, 849, 650, 849, 819, 1049, 841, 1299, 961, 1364, 1219, 1449, 1299, 1910, 1369, 1809, 1699, 2209, 1681, 2499, 1849, 2561, 2365, 2649]

cp's OEIS Frontend

A053807 a(n) = Sum_{k=1..n, n mod k = 1} k^2.

Table of values

List of values