Coefficient of x^(2n+1) in the expansion of (1+x+x^2+x^3+x^4)^n.

A104631

Coefficient of x^(2n+1) in the expansion of (1+x+x^2+x^3+x^4)^n.

Terms

    a(0) =0a(1) =1a(2) =4a(3) =18a(4) =80a(5) =365a(6) =1686a(7) =7875a(8) =37080a(9) =175725a(10) =837100a(11) =4004770a(12) =19227924a(13) =92599533a(14) =447118140a(15) =2163837030a(16) =10492874384a(17) =50972030189a(18) =248000853348

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