a(n) = coefficient of x^n in the expansion of Product_{k>=1} (1-x^k)^(3*n).
A262539
a(n) = coefficient of x^n in the expansion of Product_{k>=1} (1-x^k)^(3*n).
Terms
- a(0) =1a(1) =-3a(2) =9a(3) =-12a(4) =-99a(5) =1107a(6) =-7038a(7) =33345a(8) =-113643a(9) =151593a(10) =1547469a(11) =-17376120a(12) =112734378a(13) =-544200660a(14) =1884830229a(15) =-2551628817a(16) =-26299018683a(17) =298555990425
External references
- oeis: A262539