# A223530 (b-file synthesized from sequence entry) 1 1 2 1 3 5 4 6 5 60 6 25 7 66 8 990 9 825 10 125 11 1056 12 21120 13 26400 14 8000 15 625 16 22176 17 554400 18 924000 19 420000 20 65625 21 3125 22 576576 23 17297280 24 36036000 25 21840000 26 5118750 27 487500 28 15625 29 17873856 30 625584960 31 1563962400 32 1184820000 33 370256250 34 52893750 35 3390625 36 78125