11670384domain: NAppears in sequencesa(n) = (n+1)*(n+2)^2*(n+3)*(n+4)*(3*n+5)/240.at n=29A114243Expansion of (1/x) * Series_Reversion( x * (1 - x^2 * (1 + x)^2)^2 ).at n=14A389662