-12671domain: ZAppears in sequencesExpansion of 1/(1-x-x^2+2*x^3).at n=40A077948Expansion of 1/(1+x-x^2-2*x^3).at n=40A0779712*n^3 - 313*n^2 + 6823*n - 13633.at n=26A218456