# A223522 (b-file synthesized from sequence entry) 1 1 2 20 3 1 4 780 5 60 6 1 7 45240 8 4320 9 120 10 1 11 3483480 12 382200 13 13800 14 200 15 1 16 334414080 17 40556880 18 1734600 19 33600 20 300 21 1 22 38457619200 23 5039012160 24 243505080 25 5699400 26 69300 27 420 28 1