1/n times A104631(n), the coefficient of x^(2n+1) in the expansion of (1+x+x^2+x^3+x^4)^n.

A104632

1/n times A104631(n), the coefficient of x^(2n+1) in the expansion of (1+x+x^2+x^3+x^4)^n.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =20a(4) =73a(5) =281a(6) =1125a(7) =4635a(8) =19525a(9) =83710a(10) =364070a(11) =1602327a(12) =7123041a(13) =31937010a(14) =144255802a(15) =655804649a(16) =2998354717a(17) =13777825186a(18) =63596593430a(19) =294743653360

External references