# A148041 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 8 5 19 6 57 7 158 8 498 9 1539 10 5153 11 17072 12 59518 13 206979 14 745464 15 2692747 16 9954863 17 37024599 18 139880339 19 532405810 20 2049337223 21 7946429854 22 31083121339 23 122394588218 24 485449765051 25 1936684059573 26 7774072536288 27 31366998291556 28 127230398294122 29 518455863490298 30 2122312706665651