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A335721
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Integers m such that A014448(m) == 5 (mod m).
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1
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OFFSET
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1,2
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COMMENTS
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All terms greater than 1 are odd and composite. - Michel Marcus, Jun 19 2020
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LINKS
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MATHEMATICA
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Select[Range[10^5], Divisible[LucasL[3#] - 5, #] &] (* Amiram Eldar, Jun 19 2020 *)
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PROG
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(PARI) f(n) = my(w=quadgen(5)); (1+2*w)^n + (3-2*w)^n; \\ A014448
isok(m) = (m%2) && (m>1) && !isprime(m) && ((f(m) % m) == 5); \\ Michel Marcus, Jun 19 2020
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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