A319457 - cp's OEIS frontend

A319457 a(n) = [x^n] Product_{k>=1} 1/((1 - x^k)(1 - x^(2k)))^n.

n	a(n)
0	1
1	1
2	7
3	31
4	175
5	931
6	5209
7	29114
8	165087
9	940828
10	5396777
11	31090962
12	179832625
13	1043516371
14	6072302726
15	35420582431
16	207051636799
17	1212583329959
18	7113193757656
19	41788933655049
20	245831162935825
21	1447891754747672
22	8537111315442222
23	50387162650271055
24	297664212003582753

[1, 1, 7, 31, 175, 931, 5209, 29114, 165087, 940828, 5396777, 31090962, 179832625, 1043516371, 6072302726, 35420582431, 207051636799, 1212583329959, 7113193757656, 41788933655049, 245831162935825, 1447891754747672, 8537111315442222, 50387162650271055, 297664212003582753]

cp's OEIS Frontend

A319457 a(n) = [x^n] Product_{k>=1} 1/((1 - x^k)(1 - x^(2k)))^n.

Table of values

List of values

cp's OEIS Frontend

A319457 a(n) = [x^n] Product_{k>=1} 1/((1 - x^k)*(1 - x^(2*k)))^n.

Table of values

List of values

A319457 a(n) = [x^n] Product_{k>=1} 1/((1 - x^k)(1 - x^(2k)))^n.