273315477775domain: NAppears in sequencesNumerator of c(n) where c(0)=1, c(n+1) = n/c(n) + 1.at n=24A072898Denominator of c(n) where c(0)=1 c(n+1) = n/c(n) + 1.at n=25A072899a(n) = A000085(4*n)/2^n.at n=6A316330