# A225422 (b-file synthesized from sequence entry) 11 2 12 2 13 6 14 12 15 12 16 24 17 60 18 180 19 360 20 1260 21 5040 22 15120 23 55440 24 166320 25 831600 26 4324320 27 36756720 28 367567200 29 2327925600 30 27935107200