A308457 - cp's OEIS frontend

A308457 Expansion of e.g.f. (1/(1 - x)) * Product_{k>=2} 1/(1 - x^k)^(phi(k)/2), where phi() is the Euler totient function (A000010).

n	a(n)
0	1
1	1
2	3
3	15
4	93
5	765
6	6615
7	73395
8	855225
9	11348505
10	163593675
11	2633729175
12	44537325525
13	829112008725
14	16299062754975
15	340762189642875
16	7597436750528625
17	178862527106888625
18	4426363064514265875
19	115222810432347993375
20	3139125774622690978125

[1, 1, 3, 15, 93, 765, 6615, 73395, 855225, 11348505, 163593675, 2633729175, 44537325525, 829112008725, 16299062754975, 340762189642875, 7597436750528625, 178862527106888625, 4426363064514265875, 115222810432347993375, 3139125774622690978125]

cp's OEIS Frontend

A308457 Expansion of e.g.f. (1/(1 - x)) * Product_{k>=2} 1/(1 - x^k)^(phi(k)/2), where phi() is the Euler totient function (A000010).

Table of values

List of values