A307075 - cp's OEIS frontend

A307075 Expansion of 1/(1 - Sum_{k>=1} mu(k)x^k(1 + x^k)/(1 - x^k)^3).

n	a(n)
0	1
1	1
2	4
3	15
4	47
5	160
6	517
7	1721
8	5668
9	18687
10	61687
11	203448
12	671253
13	2214377
14	7305308
15	24100319
16	79506903
17	262294336
18	865310405
19	2854666385
20	9417565852
21	31068622271
22	102495625503
23	338133855032
24	1115506197957
25	3680063534409
26	12140557957708
27	40051794232519
28	132131177728807

[1, 1, 4, 15, 47, 160, 517, 1721, 5668, 18687, 61687, 203448, 671253, 2214377, 7305308, 24100319, 79506903, 262294336, 865310405, 2854666385, 9417565852, 31068622271, 102495625503, 338133855032, 1115506197957, 3680063534409, 12140557957708, 40051794232519, 132131177728807]

cp's OEIS Frontend

A307075 Expansion of 1/(1 - Sum_{k>=1} mu(k)x^k(1 + x^k)/(1 - x^k)^3).

Table of values

List of values

cp's OEIS Frontend

A307075 Expansion of 1/(1 - Sum_{k>=1} mu(k)*x^k*(1 + x^k)/(1 - x^k)^3).

Table of values

List of values

A307075 Expansion of 1/(1 - Sum_{k>=1} mu(k)x^k(1 + x^k)/(1 - x^k)^3).