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A023165 Numbers k such that Fib(k) == -5 (mod k). 0
1, 2, 4, 5, 10, 15, 16, 35, 40, 64, 65, 85, 115, 160, 185, 215, 235, 265, 335, 365, 415, 485, 496, 515, 535, 565, 615, 635, 685, 785, 815, 835, 865, 965, 985, 1115, 1135, 1165, 1285, 1315, 1385, 1415, 1465, 1535, 1565, 1585, 1685, 1735, 1765, 1835, 1865, 1915, 1985 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..53.

MATHEMATICA

Join[{1, 2, 4}, Select[Range[2000], Mod[Fibonacci[#], #]==#-5&]] (* Harvey P. Dale, Mar 15 2016 *)

CROSSREFS

Sequence in context: A228893 A272622 A097133 * A058299 A191616 A319909

Adjacent sequences:  A023162 A023163 A023164 * A023166 A023167 A023168

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 16 17:37 EDT 2021. Contains 348042 sequences. (Running on oeis4.)