# A006550 (b-file synthesized from sequence entry) 1 0 2 1 3 10 4 57 5 234 6 770 7 2136 8 5180 9 11292 10 22599 11 42190 12 74371 13 124950 14 201552 15 313964 16 474510 17 698456 18 1004445 19 1414962 20 1956829 21 2661730 22 3566766 23 4715040 24 6156272 25 7947444 26 10153475 27 12847926 28 16113735 29 20043982 30 24742684 31 30325620