# A052738 (b-file synthesized from sequence entry) 0 0 1 0 2 2 3 12 4 120 5 1920 6 40320 7 1028160 8 30965760 9 1077753600 10 42551308800 11 1878484608000 12 91686654259200 13 4902558383923200 14 284994551761920000 15 17895345882365952000 16 1207064057173438464000 17 87041570211234422784000