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A186510
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Number of lunar divisors of the decimal (lunar) number 111...1 (with n 1's).
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4
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9, 90, 819, 7461, 67968, 619902, 5660208, 51746211, 473692869, 4342348692, 39865757616, 366573510504, 3376339346538, 31152497957100, 287964157783869, 2666972253081303, 24749535734382636, 230152606404800004, 2144836146346691706, 20032155489077131482, 187516277719282274940, 1759326436323972795042
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OFFSET
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1,1
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COMMENTS
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It appears that this gives the largest number of lunar divisors of any n-digit lunar number.
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LINKS
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D. Applegate, M. LeBrun and N. J. A. Sloane, Dismal Arithmetic [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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