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A186510
Number of lunar divisors of the decimal (lunar) number 111...1 (with n 1's).
4
9, 90, 819, 7461, 67968, 619902, 5660208, 51746211, 473692869, 4342348692, 39865757616, 366573510504, 3376339346538, 31152497957100, 287964157783869, 2666972253081303, 24749535734382636, 230152606404800004, 2144836146346691706, 20032155489077131482, 187516277719282274940, 1759326436323972795042
OFFSET
1,1
COMMENTS
It appears that this gives the largest number of lunar divisors of any n-digit lunar number.
LINKS
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]
CROSSREFS
Sequence in context: A344068 A052386 A246941 * A158609 A229250 A242161
KEYWORD
base,nonn
AUTHOR
N. J. A. Sloane, Feb 22 2011
EXTENSIONS
More terms from N. J. A. Sloane, Feb 26 2011
STATUS
approved