# A231536 (b-file synthesized from sequence entry) 1 1 2 2 3 2 4 6 5 15 6 6 7 24 8 108 9 100 10 24 11 120 12 840 13 1340 14 705 15 120 16 720 17 7200 18 17400 19 15150 20 5466 21 720 22 5040 23 68040 24 231000 25 296100 26 171402 27 46921 28 5040 29 40320 30 705600 31 3198720 32 5644800 33 4687536 34 2015272 35 444648 36 40320 37 362880 38 7983360 39 46569600 40 108168480 41 121144464 42 73191888 43 25011576 44 4625361 45 362880