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A055725
Number of isolated lucky numbers <= 10^n.
0
0, 0, 9, 87, 762, 6448, 56580, 498141, 4447890
OFFSET
0,3
COMMENTS
An isolated lucky number is a lucky number which is not a member of a lucky twin. The set of such numbers is A000959 setminus (A031158 union A031159). - Sean A. Irvine, Apr 04 2022
CROSSREFS
KEYWORD
nonn,less,more
AUTHOR
Robert G. Wilson v, Jun 09 2000
EXTENSIONS
a(7) and title clarified by Sean A. Irvine, Apr 04 2022
a(8) from Pontus von Brömssen, Apr 04 2022
STATUS
approved