A163129 - cp's OEIS frontend

A163129 G.f.: A(q) = exp( Sum_{n>=1} sigma(n) * 3A038500(n) q^n/n ), where A038500(n) = highest power of 3 dividing n.

n	a(n)
0	1
1	3
2	9
3	30
4	75
5	180
6	441
7	969
8	2070
9	4431
10	8964
11	17775
12	35094
13	66975
14	125865
15	235053
16	429096
17	773766
18	1386027
19	2442372
20	4260645
21	7384578
22	12640320
23	21453975
24	36192519
25	60454713
26	100250100
27	165311094
28	270391857
29	439479198
30	710631279

[1, 3, 9, 30, 75, 180, 441, 969, 2070, 4431, 8964, 17775, 35094, 66975, 125865, 235053, 429096, 773766, 1386027, 2442372, 4260645, 7384578, 12640320, 21453975, 36192519, 60454713, 100250100, 165311094, 270391857, 439479198, 710631279]

cp's OEIS Frontend

A163129 G.f.: A(q) = exp( Sum_{n>=1} sigma(n) * 3A038500(n) q^n/n ), where A038500(n) = highest power of 3 dividing n.

Table of values

List of values

cp's OEIS Frontend

A163129 G.f.: A(q) = exp( Sum_{n>=1} sigma(n) * 3*A038500(n) * q^n/n ), where A038500(n) = highest power of 3 dividing n.

Table of values

List of values

A163129 G.f.: A(q) = exp( Sum_{n>=1} sigma(n) * 3A038500(n) q^n/n ), where A038500(n) = highest power of 3 dividing n.