# A047069 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 50 4 292 5 1757 6 10809 7 67473 8 425711 9 2707757 10 17332058 11 111508304 12 720429774 13 4670990039 14 30375989547 15 198050065342 16 1294186149138 17 8473767434587 18 55579644024480 19 365116858320540 20 2401901294047629 21 15820713708790749 22 104326220133691996