# A096354 (b-file synthesized from sequence entry) 1 2 2 4 3 9 4 19 5 51 6 177 7 747 8 3638 9 19691 10 115237 11 716530 12 4675989 13 31744547 14 222714791 15 1606590368 16 11868687555 17 89506353843 18 687275943030 19 5361745095952 20 42423407975227 21 339921277226567 22 2754682467870463 23 22553369649557926 24 186375668569345609