# A256215 (b-file synthesized from sequence entry) 1 1 2 2 3 2 4 6 5 18 6 9 7 24 8 144 9 192 10 64 11 120 12 1200 13 3000 14 2500 15 625 16 720 17 10800 18 43200 19 64800 20 38880 21 7776 22 5040 23 105840 24 617400 25 1440600 26 1512630 27 705894 28 117649