OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MAPLE
MATHEMATICA
Table[PowerMod[2, n-4, n], {n, Select[Range[100], CompositeQ]}] (* Harvey P. Dale, Aug 01 2021 *)
CROSSREFS
KEYWORD
nonn,less
AUTHOR
Juri-Stepan Gerasimov, Dec 04 2010
EXTENSIONS
Corrected by D. S. McNeil, Dec 04 2010
STATUS
approved