# A203767 (b-file synthesized from sequence entry) 1 2 2 25 3 200 4 16900 5 304200 6 72250000 7 2312000000 8 1104760757776 9 55238037888800 10 44628759527040000 11 3213270685946880000 12 3948896391660025000000 13 386991846382682450000000 14 673918119287694361600000000