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A221018 Number n such that Fibonacci(n) is divisible by n, n + 1 and n - 1. 9
108, 2688, 3528, 4968, 6480, 15288, 18048, 20808, 21000, 25308, 35448, 47520, 62928, 68208, 81648, 82008, 97608, 103968, 108288, 116928, 137088, 139968, 151848, 162288, 196560, 197568, 200928, 235008, 238728, 253368, 278208, 363888, 379008, 400248, 444528, 449568, 457608 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n such that Fibonacci(n) mod n = Fibonacci(n) mod (n-1) = Fibonacci(n) mod (n+1) = 0.

Subsequence of A023172.

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..200

PROG

(Python)

prpr, prev = 0, 1

for n in range(2, 100000):

    prpr, prev = prev, prpr+prev

    if n%2: continue

    if (prev % n, prev % (n-1), prev % (n+1)) == (0, 0, 0):

        print(n, end=", ")

CROSSREFS

Cf. A000045, A023172, A225219.

Sequence in context: A063809 A183357 A264681 * A338381 A269182 A244877

Adjacent sequences:  A221015 A221016 A221017 * A221019 A221020 A221021

KEYWORD

nonn

AUTHOR

Alex Ratushnyak, May 03 2013

STATUS

approved

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Last modified January 28 10:49 EST 2022. Contains 350655 sequences. (Running on oeis4.)