a(n) = [x^(n*(n+1)*(2*n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(k*m^2).
A321208
a(n) = [x^(n*(n+1)*(2*n+1)/6)] Product_{k=1..n} Sum_{m>=0} x^(k*m^2).
Terms
- a(0) =1a(1) =1a(2) =0a(3) =2a(4) =7a(5) =31a(6) =167a(7) =1046a(8) =7949a(9) =60487a(10) =490753a(11) =4232323a(12) =39877499a(13) =401064825a(14) =4191449438a(15) =45993709856a(16) =526379057073
External references
- oeis: A321208