# A045627 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 9 4 34 5 125 6 459 7 1715 8 6432 9 24300 10 92375 11 352715 12 1352034 13 5200299 14 20058297 15 77558625 16 300540160 17 1166803109 18 4537567188 19 17672631899 20 68923264250 21 269128935495 22 1052049481857 23 4116715363799 24 16123801834656