95705domain: NAppears in sequencesG.f.: 1 / Product_{n>=0} (1 - x^(n+5))^((n+1)*(n+2)*(n+3)*(n+4)/4!).at n=21A264925Expansion of (1/x) * Series_Reversion( x * (1-x) / (1+x^2)^2 ).at n=9A369226