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A055066
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Number of 7-covers of an n-set.
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6
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7, 62, 664, 8609, 127415, 2004975, 31500927, 474504448, 6708348262, 88249739792, 1078567590128, 12269901302433, 130370516668917, 1298891291366245, 12182760243381355, 107979270564656625
(list; graph; refs; listen; history; internal format)
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