A320897 - cp's OEIS frontend

A320897 a(n) = Sum_{k=1..n} k^2 * tau(k)^2, where tau is A000005.

n	a(n)
1	1
2	17
3	53
4	197
5	297
6	873
7	1069
8	2093
9	2822
10	4422
11	4906
12	10090
13	10766
14	13902
15	17502
16	23902
17	25058
18	36722
19	38166
20	52566
21	59622
22	67366
23	69482
24	106346
25	111971
26	122787
27	134451
28	162675
29	166039
30	223639
31	227483
32	264347
33	281771
34	300267
35	319867
36	424843
37	430319
38	453423

[1, 17, 53, 197, 297, 873, 1069, 2093, 2822, 4422, 4906, 10090, 10766, 13902, 17502, 23902, 25058, 36722, 38166, 52566, 59622, 67366, 69482, 106346, 111971, 122787, 134451, 162675, 166039, 223639, 227483, 264347, 281771, 300267, 319867, 424843, 430319, 453423]

cp's OEIS Frontend

A320897 a(n) = Sum_{k=1..n} k^2 * tau(k)^2, where tau is A000005.

Table of values

List of values