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A023181 Numbers n such that Fib(n) == 55 (mod n). 0
1, 2, 4, 5, 7, 10, 14, 15, 105, 110, 119, 190, 220, 290, 310, 410, 590, 610, 710, 790, 874, 890, 1010, 1090, 1310, 1390, 1490, 1510, 1790, 1810, 1910, 1990, 2110, 2170, 2290, 2390, 2410, 2510, 2690, 2710, 2726, 2810, 2860, 3110, 3310, 3490, 3590, 3790, 3890 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

Join[{1, 2, 4, 5, 7, 10, 14, 15}, Select[Range[100, 3900], Mod[Fibonacci[#], #] == 55&]] (* Harvey P. Dale, May 20 2019 *)

CROSSREFS

Sequence in context: A056716 A223729 A190235 * A123065 A115334 A167792

Adjacent sequences:  A023178 A023179 A023180 * A023182 A023183 A023184

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 12 12:15 EDT 2020. Contains 336439 sequences. (Running on oeis4.)