A027860 - cp's OEIS frontend

A027860 a(n) = (-tau(n) + sigma_11(n)) / 691, where tau is Ramanujan's tau (A000594), sigma_11(n) = Sum_{ d divides n } d^11 (A013959).

n	a(n)
1	0
2	3
3	256
4	6075
5	70656
6	525300
7	2861568
8	12437115
9	45414400
10	144788634
11	412896000
12	1075797268
13	2593575936
14	5863302600
15	12517805568
16	25471460475
17	49597544448
18	93053764671
19	168582124800
20	296526859818
21	506916761600
22	846025507836
23	1378885295616
24	2203231674900

[0, 3, 256, 6075, 70656, 525300, 2861568, 12437115, 45414400, 144788634, 412896000, 1075797268, 2593575936, 5863302600, 12517805568, 25471460475, 49597544448, 93053764671, 168582124800, 296526859818, 506916761600, 846025507836, 1378885295616, 2203231674900]

cp's OEIS Frontend

A027860 a(n) = (-tau(n) + sigma_11(n)) / 691, where tau is Ramanujan's tau (A000594), sigma_11(n) = Sum_{ d divides n } d^11 (A013959).

Table of values

List of values