# A014704 (b-file synthesized from sequence entry) 0 1 1 72 2 2400 3 52576 4 870732 5 11739984 6 134825216 7 1359259200 8 12290396058 9 101268020984 10 769721861376 11 5449376818656 12 36216000728200 13 227395735413552 14 1356190070338560 15 7717657198319936 16 42069113073665703 17 220400042813587800