# A353013 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 28 4 264 5 3207 6 47696 7 839412 8 17061280 9 393264145 10 10135913792 11 288839201432 12 9017184333440 13 306045200463519 14 11220008681600256 15 441866073895351128 16 18603606156815235584 17 833860238440653331505 18 39643749441387211150336