# A278073 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 0 4 1 5 20 6 0 7 1 8 168 9 1680 10 0 11 1 12 1364 13 55440 14 369600 15 0 16 1 17 10920 18 1561560 19 33633600 20 168168000 21 0 22 1 23 87380 24 42771456 25 2385102720 26 34306272000 27 137225088000 28 0 29 1 30 699048 31 1160164320 32 158411809920 33 5105916816000 34 54752810112000 35 182509367040000