# A223529 (b-file synthesized from sequence entry) 1 1 2 6 3 5 4 66 5 110 6 25 7 1056 8 2640 9 1200 10 125 11 22176 12 73920 13 50400 14 10500 15 625 16 576576 17 2402400 18 2184000 19 682500 20 81250 21 3125 22 17873856 23 89369280 24 101556000 25 42315000 26 7556250 27 581250 28 15625 29 643458816 30 3753509760 31 5118422400 32 2665845000 33 634725000