4203998domain: NAppears in sequencesp-INVERT of (1,0,1,0,0,0,0,...), where p(S) = (1 - S)(1 + S^2).at n=42A291741Expansion of (1 + x)/(1 - x^2*(1 + x)^4).at n=21A375316Expansion of (1 + x - x^3)/((1 + x - x^3)^2 - 4*x).at n=20A376785Expansion of 1 / ((1-x)^2 - x^6).at n=40A392541