# A090441 (b-file synthesized from sequence entry) -1 1 0 1 1 1 2 1 3 1 4 1 5 1 6 2 7 2 8 1 9 1 10 6 11 12 12 6 13 1 14 1 15 24 16 144 17 144 18 24 19 1 20 1 21 120 22 2880 23 8640 24 2880 25 120 26 1 27 1 28 720 29 86400 30 1036800 31 1036800 32 86400 33 720 34 1 35 1 36 5040 37 3628800 38 217728000 39 870912000 40 217728000 41 3628800 42 5040 43 1 44 1 45 40320 46 203212800 47 73156608000