# A026151 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 12 5 32 6 89 7 246 8 685 9 1912 10 5355 11 15038 12 42339 13 119484 14 337935 15 957738 16 2719539 17 7736208 18 22044444 19 62916696 20 179841270 21 514793944 22 1475586687 23 4234989242 24 12169352003 25 35009302296 26 100826681530 27 290683486132 28 838873595124