85429688domain: NAppears in sequencesA triangle of polynomial coefficients: q(x,n)=-((x - 1)^(2*n + 1)/x^n)*Sum[(2*k + 1)^n*Binomial[k, n]*x^k, {k, 0, Infinity}]; p(x,n)=q(x,n)+x^n*q(1/x,n).at n=28A155915Number of compositions of even natural numbers in 7 parts <= n.at n=14A191494