# A368875 (b-file synthesized from sequence entry) 0 6 1 16 2 105 3 1008 4 12012 5 164736 6 2494206 7 40646320 8 701149020 9 12655450080 10 237026033790 11 4577828250240 12 90739095674400 13 1838979005667840 14 37993593597567210 15 798259862714284080 16 17022152442879594780 17 367791659430639444000 18 8040845154302354844450