# A024442 (b-file synthesized from sequence entry) 0 1 1 28 2 518 3 7988 4 111279 5 1454376 6 18208156 7 221140696 8 2626932077 9 30692791844 10 354119115714 11 4046102802924 12 45880411771195 13 517157095113232 14 5801772397167992 15 64842434348911472 16 722511991410929433