# A266488 (b-file synthesized from sequence entry) 0 1 1 1 2 0 3 1 4 4 5 0 6 1 7 12 8 42 9 0 10 1 11 24 12 216 13 752 14 0 15 1 16 40 17 660 18 5440 19 19360 20 0 21 1 22 60 23 1560 24 22320 25 178920 26 654912 27 0 28 1 29 84 30 3150 31 68320 32 916440 33 7316064 34 27546736 35 0 36 1 37 112 38 5712 39 173600 40 3432800 41 44693376 42 359051392 43 1388207872 44 0 45 1 46 144 47 9576 48 387072 49 10493280 50 197261568 51 2536797312 52 20605529088 53 81621893376 54 0 55 1 56 180 57 15120 58 782880 59 27735120 60 702777600 61 12845683200 62 164732083200 63 1355581612800 64 5488951731200 65 0