A350143 - cp's OEIS frontend

A350143 a(n) = Sum_{k=1..n} floor(n/(2*k-1))^2.

n	a(n)
1	1
2	4
3	10
4	17
5	27
6	41
7	55
8	70
9	93
10	115
11	137
12	167
13	193
14	223
15	267
16	298
17	332
18	381
19	419
20	465
21	525
22	571
23	617
24	679
25	738
26	792
27	868
28	930
29	988
30	1080
31	1142
32	1205
33	1297
34	1367
35	1459
36	1560
37	1634
38	1712
39	1820
40	1914
41	1996
42	2120
43	2206
44	2300
45	2450
46	2544
47	2638
48	2764
49	2875
50	2996
51	3136
52	3246

[1, 4, 10, 17, 27, 41, 55, 70, 93, 115, 137, 167, 193, 223, 267, 298, 332, 381, 419, 465, 525, 571, 617, 679, 738, 792, 868, 930, 988, 1080, 1142, 1205, 1297, 1367, 1459, 1560, 1634, 1712, 1820, 1914, 1996, 2120, 2206, 2300, 2450, 2544, 2638, 2764, 2875, 2996, 3136, 3246]

cp's OEIS Frontend

A350143 a(n) = Sum_{k=1..n} floor(n/(2*k-1))^2.

Table of values

List of values