# A047063 (b-file synthesized from sequence entry) 1 1 2 2 3 5 4 16 5 53 6 179 7 637 8 2302 9 8481 10 31553 11 118050 12 445260 13 1688727 14 6438285 15 24645509 16 94629373 17 364407934 18 1406835343 19 5443691793 20 21106577597 21 81977147966 22 318895294012 23 1242270865697 24 4845566251183 25 18922717069433 26 73975062360180 27 289475083120883