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A221018
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Number n such that Fibonacci(n) is divisible by n, n + 1 and n - 1.
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9
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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
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OFFSET
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1,1
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COMMENTS
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Numbers n such that Fibonacci(n) mod n = Fibonacci(n) mod (n-1) = Fibonacci(n) mod (n+1) = 0.
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LINKS
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PROG
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(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=", ")
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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