a(n) = [x^n] Product_{k>=1} (1 + x^k)^(sigma_n(k)-k^n).
A321261
a(n) = [x^n] Product_{k>=1} (1 + x^k)^(sigma_n(k)-k^n).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =17a(5) =2a(6) =859a(7) =131a(8) =105508a(9) =40907a(10) =72916903a(11) =6834168a(12) =228239366293a(13) =27616985835
External references
- oeis: A321261