# A115389 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 3 5 6 6 5 7 30 8 105 9 140 10 126 11 1260 12 1155 13 13860 14 12870 15 12012 16 9009 17 72072 18 68068 19 1225224 20 5819814 21 5542680 22 5290740 23 116396280 24 111546435 25 535422888 26 514829700 27 1487285800 28 1434168450 29 5736673800 30 5545451340 31 166363540200 32 644658718275 33 312561802800