# A134827 (b-file synthesized from sequence entry) 1 1 2 2 3 8 4 18 5 78 6 206 7 872 8 2226 9 10820 10 26558 11 129248 12 335886 13 1630174 14 3990978 15 21778450 16 48749804 17 274937594 18 650637382 19 3598954596 20 7610277626 21 49741540498 22 93757794966 23 639655810986 24 1233712869392 25 8530089042832