A321181 - cp's OEIS frontend

A321181 a(n) = [x^((n(n+1)/2)^2)] Product_{k=1..n} Sum_{m>=0} x^(km^2).

n	a(n)
0	1
1	1
2	2
3	7
4	28
5	262
6	3428
7	52289
8	1147221
9	30161625
10	893291633
11	30894822277
12	1214415301634
13	52617692115135
14	2528123847871538
15	133088227043557512
16	7574733515354756765
17	466116310963215784930
18	30810712157925101729430
19	2173319693639115252360852
20	163247410881483617710298406

[1, 1, 2, 7, 28, 262, 3428, 52289, 1147221, 30161625, 893291633, 30894822277, 1214415301634, 52617692115135, 2528123847871538, 133088227043557512, 7574733515354756765, 466116310963215784930, 30810712157925101729430, 2173319693639115252360852, 163247410881483617710298406]

cp's OEIS Frontend

A321181 a(n) = [x^((n(n+1)/2)^2)] Product_{k=1..n} Sum_{m>=0} x^(km^2).

Table of values

List of values

cp's OEIS Frontend

A321181 a(n) = [x^((n*(n+1)/2)^2)] Product_{k=1..n} Sum_{m>=0} x^(k*m^2).

Table of values

List of values

A321181 a(n) = [x^((n(n+1)/2)^2)] Product_{k=1..n} Sum_{m>=0} x^(km^2).