# A340556 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 0 4 1 5 2 6 0 7 1 8 8 9 6 10 0 11 1 12 22 13 58 14 24 15 0 16 1 17 52 18 328 19 444 20 120 21 0 22 1 23 114 24 1452 25 4400 26 3708 27 720 28 0 29 1 30 240 31 5610 32 32120 33 58140 34 33984 35 5040 36 0 37 1 38 494 39 19950 40 195800 41 644020 42 785304 43 341136 44 40320 45 0 46 1 47 1004 48 67260 49 1062500 50 5765500 51 12440064 52 11026296 53 3733920 54 362880