# A111298 (b-file synthesized from sequence entry) 0 15 1 6 2 90 3 9 4 810 5 9 6 7290 7 18 8 131220 9 9 10 1180980 11 27 12 31886460 13 36 14 1147912560 15 36 16 41324852160 17 36 18 1487694677760 19 72 20 107114016798720 21 54 22 5784156907130880 23 72 24 416459297313423360 25 72 26 29985069406566481920 27 99 28 2968521871250081710080