6686979domain: NAppears in sequencesQuintisection of 1/(1-x^3-x^4).at n=17A099101Expansion of x/(1 - 2*x^2 - x^3 + x^4).at n=42A122514p-INVERT of (1,1,1,1,1,...), where p(S) = 1 - S^3 - S^4.at n=21A290998Expansion of (1 - x) / ((1 - x)^3 - x^4).at n=27A375169