# A193939 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 25 4 207 5 1901 6 22323 7 295597 8 4554763 9 78201805 10 1499474883 11 31541086853 12 724817679171 13 18030594344725 14 483229053783115 15 13872831410796973 16 424869901099340235 17 13824490678644370109 18 476299421571109945971 19 17321461645693901532181 20 663085324931813890398355