# A292760 (b-file synthesized from sequence entry) 0 0 1 1 2 5 3 20 4 83 5 375 6 1860 7 10205 8 61701 9 409240 10 2959775 11 23209055 12 196266104 13 1781241825 14 17274311925 15 178313963300 16 1952338563867 17 22601633554855 18 275867860584620 19 3540918330014765 20 47682832410552965 21 672211363480355880 22 9901286664553498695 23 152101199645144064575