# A162985 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 6 5 12 6 25 7 53 8 114 9 249 10 550 11 1227 12 2760 13 6253 14 14256 15 32682 16 75293 17 174224 18 404741 19 943622 20 2207135 21 5177817 22 12179904 23 28722736 24 67890481 25 160812128 26 381671061 27 907529504 28 2161622683 29 5157014539 30 12321750366 31 29482362166