# A333420 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 6 5 25 6 6 7 24 8 343 9 110 10 10 11 120 12 6561 13 3375 14 324 15 15 16 720 17 161051 18 144400 19 17576 20 756 21 21 22 5040 23 4826809 24 7962624 25 1336336 26 64000 27 1521 28 28 29 40320 30 170859375 31 535387328 32 130691232 33 7595536 34 185193 35 2756 36 36 37 3628800 38 6975757441