# A143493 (b-file synthesized from sequence entry) 4 1 5 4 6 1 7 20 8 9 9 1 10 120 11 74 12 15 13 1 14 840 15 638 16 179 17 22 18 1 19 6720 20 5944 21 2070 22 355 23 30 24 1 25 60480 26 60216 27 24574 28 5265 29 625 30 39 31 1 32 604800 33 662640 34 305956 35 77224 36 11515 37 1015 38 49 39 1 40 6652800 41 7893840 42 4028156 43 1155420 44 203889 45 22680 46 1554 47 60 48 1 49 79833600