A321186 - cp's OEIS frontend

A321186 a(n) = [x^(n(n+1)(2n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(k^2m).

n	a(n)
0	1
1	1
2	2
3	6
4	25
5	123
6	683
7	4083
8	25839
9	171324
10	1178755
11	8362768
12	60867478
13	452760486
14	3431366195
15	26430813268
16	206504120774
17	1633813641572
18	13071700375914
19	105635826348216
20	861408409243195
21	7081998941608535
22	58658594339423251
23	489168002223876023
24	4104791591982736028

[1, 1, 2, 6, 25, 123, 683, 4083, 25839, 171324, 1178755, 8362768, 60867478, 452760486, 3431366195, 26430813268, 206504120774, 1633813641572, 13071700375914, 105635826348216, 861408409243195, 7081998941608535, 58658594339423251, 489168002223876023, 4104791591982736028]

cp's OEIS Frontend

A321186 a(n) = [x^(n(n+1)(2n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(k^2m).

Table of values

List of values

cp's OEIS Frontend

A321186 a(n) = [x^(n*(n+1)*(2*n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(k^2*m).

Table of values

List of values

A321186 a(n) = [x^(n(n+1)(2n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(k^2m).