75975domain: NAppears in sequencesa(0) = 0, a(1) = 1 and for n >= 2, a(n) = floor(2 * sqrt(a(n-2) * a(n-1))).at n=27A093333a(n) = floor(5^n/3^n).at n=22A094974Number of closed walks of length 2n on the Heawood graph from a given node.at n=6A109498Expansion of g.f. x*(1-6*x^2)/(1-3*x-2*x^2+6*x^3).at n=11A138017