# A292619 (b-file synthesized from sequence entry) 0 1 1 3 2 8 3 21 4 54 5 144 6 404 7 1195 8 3712 9 12000 10 39994 11 136400 12 473430 13 1665868 14 5926476 15 21275805 16 76964808 17 280250088 18 1026309908 19 3777411342 20 13965286180 21 51837285776 22 193107846304 23 721732334136 24 2705480787422 25 10169387310362 26 38320472420462 27 144733083435688