# A089066 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 3 5 8 6 38 7 192 8 1320 9 10176 10 91296 11 908160 12 9985920 13 119761920 14 1556847360 15 21794734080 16 326920043520 17 5230700052480 18 88921882828800 19 1600593472880640 20 30411275613143040 21 608225502973132800