5472827392domain: NAppears in sequencesa(0) = a(1) = 1; a(n+2) = 2*a(n+1) + 2*a(n).at n=23A026150Generalized NSW numbers.at n=11A107903Sequence arising from the factorization of F(n)=A002605 and L(n)=A080040 F(0)=0, F(1)=1, F(n)=2*F(n-1)+2*F(n-2), L(0)=2, L(1)=2, L(n)=2*L(n-1)+2*L(n-2).at n=22A127259