142844domain: NAppears in sequencesGeneralized Catalan Numbers x^3*A(x)^2 -(1-x+x^3+x^4)*A(x) + 1 =0.at n=23A023433Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+2x+2y>0.at n=33A211624Number of positive integers k less than 10^n such that k is a sum of two squares and k/2 is an even power.at n=5A275650