A triangular sequence of polynomial coefficients: p(x,n)=((-1)^(n + 1)*(x - 1)^(n + 1)*Sum[(5*m + 4)^n*x^m, {m, 0, Infinity}] + (-1)^(n + 1)*(x - 1)^(n + 1)*Sum[(5*m + 1)^n*x^m, {m, 0, Infinity}]).

A154816

A triangular sequence of polynomial coefficients: p(x,n)=((-1)^(n + 1)*(x - 1)^(n + 1)*Sum[(5*m + 4)^n*x^m, {m, 0, Infinity}] + (-1)^(n + 1)*(x - 1)^(n + 1)*Sum[(5*m + 1)^n*x^m, {m, 0, Infinity}]).