58267domain: NAppears in sequencesExpansion of (1-x)^(-1)/(1-x+2*x^2-2*x^3).at n=36A077874a(n) = number of grid points that are covered after (2^n)th stage of A139250.at n=8A160128Numbers k for which 6k+1, 24k+5, 432k^2+72k-1, and 432k^2+90k-1 are all prime.at n=48A175513