# A149196 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 10 4 38 5 127 6 494 7 1810 8 7268 9 27912 10 114154 11 451876 12 1870214 13 7556208 14 31544667 15 129329742 16 543487817 17 2252645560 18 9516508678 19 39775691833 20 168765617735 21 710070538250 22 3023728881311 23 12790562936592 24 54635201884356 25 232135353844036 26 994221665514359 27 4239978191222562