# A375688 (b-file synthesized from sequence entry) 0 1 1 0 2 2 3 3 4 56 5 270 6 4824 7 44520 8 866816 9 12195792 10 267873120 11 5073187680 12 126754229568 13 2999710359360 14 85061489235072 15 2400155295632640 16 76724104598031360 17 2502434971473937920 18 89428428468644493312 19 3300036525511418327040