# A149169 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 9 4 42 5 130 6 610 7 2095 8 10150 9 37696 10 182974 11 707948 12 3478480 13 13945828 14 68567200 15 280881929 16 1389304994 17 5806737116 18 28728911784 19 121676284776 20 604030685918 21 2591257765764 22 12865089610340 23 55687296132644 24 277050189053338 25 1209869597923106 26 6019537343834174 27 26457591393814204