-5673domain: ZAppears in sequencesA transform of the Catalan numbers with a simple Hankel transform.at n=25A157127Values of n such that L(17) and N(17) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=44A227520G.f. satisfies: A(x) = A(x^2 - x^3)/(1-x).at n=35A251659