# A047803 (b-file synthesized from sequence entry) 0 1 1 720 2 146512 3 8565952 4 196434000 5 2317602912 6 17225174720 7 93710019456 8 407503812688 9 1487330605840 10 4744665673056 11 13523554712640 12 35251061710528 13 84944383084512 14 192127846616960 15 409984044318336 16 834655060080720