# A149677 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 17 4 65 5 273 6 1141 7 4913 8 21757 9 95985 10 434329 11 1968573 12 8998853 13 41513797 14 191940185 15 893808309 16 4177271209 17 19586280777 18 92245079185 19 435366093701 20 2061445246489 21 9785084691865 22 46540629413881 23 221897111004121 24 1059736114267041 25 5070514539225085 26 24301575479538273 27 116635223286925777