# A330250 (b-file synthesized from sequence entry) 1 1 2 3 3 10 4 45 5 246 6 1596 7 11472 8 96768 9 905760 10 9282240 11 104328000 12 1285502400 13 17030200320 14 242650598400 15 3685666037760 16 60059908823040 17 1032474885120000 18 18781151090688000 19 360710540426880000 20 7302919022138880000 21 154603891182698496000 22 3423234952360194048000