# A371584 (b-file synthesized from sequence entry) 0 1 1 2 2 15 3 138 4 1435 5 16074 6 189238 7 2308640 8 28927579 9 370084760 10 4814147248 11 63482437724 12 846678807008 13 11401357736202 14 154800183842738 15 2116833422071448 16 29128279396373599 17 403029526567463278 18 5603854904038673961 19 78260199678455985082 20 1097257906416031628336