83710domain: NAppears in sequences1/n times A104631(n), the coefficient of x^(2n+1) in the expansion of (1+x+x^2+x^3+x^4)^n.at n=9A104632a(n) = a(n) = +13*a(n-2) +7*a(n-3) -47*a(n-4) -38*a(n-5) +48*a(n-6) +43*a(n-7) -7*a(n-8) -1*a(n-9).at n=9A134325