A321208 - cp's OEIS frontend

A321208 a(n) = [x^(n(n+1)(2n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(km^2).

n	a(n)
0	1
1	1
2	0
3	2
4	7
5	31
6	167
7	1046
8	7949
9	60487
10	490753
11	4232323
12	39877499
13	401064825
14	4191449438
15	45993709856
16	526379057073
17	6284584514360
18	77594053714675
19	990497759689341
20	13053609492660678
21	177385290308586391
22	2480368806876623852
23	35617209442716039028
24	524705024124493308382

[1, 1, 0, 2, 7, 31, 167, 1046, 7949, 60487, 490753, 4232323, 39877499, 401064825, 4191449438, 45993709856, 526379057073, 6284584514360, 77594053714675, 990497759689341, 13053609492660678, 177385290308586391, 2480368806876623852, 35617209442716039028, 524705024124493308382]

cp's OEIS Frontend

A321208 a(n) = [x^(n(n+1)(2n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(km^2).

Table of values

List of values

cp's OEIS Frontend

A321208 a(n) = [x^(n*(n+1)*(2*n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(k*m^2).

Table of values

List of values

A321208 a(n) = [x^(n(n+1)(2n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(km^2).