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 A335721 Integers m such that A014448(m) == 5 (mod m). 1
 1, 213, 85887, 974943, 2463831, 3952791, 217643749, 286354743, 874273639, 14029228621 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Inspired by A335670. All terms greater than 1 are odd and composite. - Michel Marcus, Jun 19 2020 LINKS MATHEMATICA Select[Range[10^5], Divisible[LucasL[3#] - 5, #] &] (* Amiram Eldar, Jun 19 2020 *) PROG (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 CROSSREFS Cf. A014448, A335670, A335722. Sequence in context: A280898 A180395 A242793 * A242804 A076159 A258961 Adjacent sequences:  A335718 A335719 A335720 * A335722 A335723 A335724 KEYWORD nonn,more AUTHOR Chai Wah Wu, Jun 18 2020 EXTENSIONS a(7)-a(10) from Giovanni Resta, Jun 19 2020 STATUS approved

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Last modified January 27 03:09 EST 2022. Contains 350601 sequences. (Running on oeis4.)