A258793 - cp's OEIS frontend

A258793 a(n) = [x^n] Product_{k=1..n} 1/(x^(2k)(1-x^k)^2).

n	a(n)
0	1
1	4
2	55
3	896
4	16494
5	326422
6	6812064
7	147937628
8	3315019979
9	76184664934
10	1787702723767
11	42688437971038
12	1034621287862521
13	25398832816003228
14	630502487733706193
15	15805630063826901440
16	399669931534045129915
17	10184690536676439639278
18	261340023300544414822171

[1, 4, 55, 896, 16494, 326422, 6812064, 147937628, 3315019979, 76184664934, 1787702723767, 42688437971038, 1034621287862521, 25398832816003228, 630502487733706193, 15805630063826901440, 399669931534045129915, 10184690536676439639278, 261340023300544414822171]

cp's OEIS Frontend

A258793 a(n) = [x^n] Product_{k=1..n} 1/(x^(2k)(1-x^k)^2).

Table of values

List of values

cp's OEIS Frontend

A258793 a(n) = [x^n] Product_{k=1..n} 1/(x^(2*k)*(1-x^k)^2).

Table of values

List of values

A258793 a(n) = [x^n] Product_{k=1..n} 1/(x^(2k)(1-x^k)^2).