551475domain: NAppears in sequencesExpansion of 1/(1-x+2*x^2+2*x^3).at n=24A077956Expansion of 1/(1+x+2*x^2-2*x^3).at n=24A077977Positions of 4's in A234323.at n=54A234805Numbers k such that {k^2 + 2, k^2 + 4} and {k^3 + 2, k^3 + 4} are twin prime pairs.at n=29A283698