# A125475 (b-file synthesized from sequence entry) 0 1 1 18 2 252 3 3168 4 44472 5 634368 6 9124092 7 131601852 8 1900243080 9 27449395092 10 396572715092 11 5729777752772 12 82786984432932 13 1196161590550776 14 17282993079833922 15 249717254801438778 16 3608098064502340024