# A121922 (b-file synthesized from sequence entry) 0 -1 1 1 2 -3 3 -1 4 4 5 -11 6 1 7 -5 8 18 9 -50 10 -1 11 6 12 -27 13 96 14 -274 15 1 16 -7 17 38 18 -168 19 600 20 -1764 21 -1 22 8 23 -51 24 272 25 -1200 26 4320 27 -13068 28 1 29 -9 30 66 31 -414 32 2200 33 -9720 34 35280 35 -109584 36 -1 37 10 38 -83 39 600 40 -3750 41 19920 42 -88200 43 322560 44 -1026576 45 1 46 -11 47 102 48 -836 49 6024 50 -37620 51 199920 52 -887040 53 3265920 54 -10628640