217379domain: NAppears in sequencesExpansion of x * (x+1) * (x^3-x^2-1) / ((x^2+1) * (x^3+x^2-1)).at n=46A122519Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+x+y>0.at n=38A211545a(0) = a(1) = a(2) = a(3) = 1; thereafter a(n) = a(n-1) + a(n-2) + a(n-4).at n=24A307677