# A173249 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 6 4 22 5 147 6 1443 7 18250 8 280394 9 5063363 10 105063363 11 2463011054 12 64380375278 13 1856540769315 14 58550453144611 15 2004745521503986 16 74062339559431922 17 2936485391069247715 18 124376016487663499491