A279395 - cp's OEIS frontend

A279395 a(n) = Sum_{ d >= 1, d divides n} (-1)^(n-d)*d^4.

n	a(n)
1	1
2	15
3	82
4	271
5	626
6	1230
7	2402
8	4367
9	6643
10	9390
11	14642
12	22222
13	28562
14	36030
15	51332
16	69903
17	83522
18	99645
19	130322
20	169646
21	196964
22	219630
23	279842
24	358094
25	391251
26	428430
27	538084
28	650942
29	707282
30	769980
31	923522
32	1118479
33	1200644
34	1252830
35	1503652
36	1800253
37	1874162
38	1954830
39	2342084
40	2733742

[1, 15, 82, 271, 626, 1230, 2402, 4367, 6643, 9390, 14642, 22222, 28562, 36030, 51332, 69903, 83522, 99645, 130322, 169646, 196964, 219630, 279842, 358094, 391251, 428430, 538084, 650942, 707282, 769980, 923522, 1118479, 1200644, 1252830, 1503652, 1800253, 1874162, 1954830, 2342084, 2733742]

cp's OEIS Frontend

A279395 a(n) = Sum_{ d >= 1, d divides n} (-1)^(n-d)*d^4.

Table of values

List of values