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A094400
Odd n dividing Fibonacci(n)-1 but neither Fibonacci(n-1) nor Fibonacci(n+1).
5
7743, 27071, 54839, 72831, 217257, 388367, 417601, 575599, 670879, 691447, 701569, 809999, 850541, 881011, 1274897, 1365407, 1383249, 1464449, 1504097, 1653751, 1922817, 2106017, 2276351, 2385811, 2474047, 2556553, 2628879, 2697899, 2804543, 3017729, 3352049
OFFSET
1,1
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..559 (terms < 4*10^9)
MATHEMATICA
Select[Range[50000], OddQ[ # ] && Mod[Fibonacci[ # ] - 1, # ] == 0 && ! Mod[Fibonacci[ # - 1], # ] == 0 && ! Mod[Fibonacci[ # + 1], # ] == 0 &]
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric Rowland, May 01 2004
EXTENSIONS
Offset corrected by and a(15)-a(31) from Giovanni Resta, Jul 20 2013
STATUS
approved