# A099866 (b-file synthesized from sequence entry) 1 1 2 2 3 1 4 3 5 4 6 20 7 5 8 35 9 56 10 504 11 70 12 770 13 3960 14 1144 15 1001 16 45045 17 80080 18 1361360 19 204204 20 184756 21 67184 22 470288 23 323323 24 7436429 25 27457584 26 228813200 27 106234700 28 2868336900 29 356948592 30 10351509168 31 145568097675 32 45581929575 33 85801279200