112721domain: NAppears in sequencesDescribe the n-th Fibonacci number A000045(n).at n=22A045988G.f.: Product_{i>=1, j>=1, k>=1} (1 + x^(i*j*k)).at n=23A280473Number of 4-sided regions in the Farey Diagram Farey(n,n), divided by 8.at n=13A358303