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 A354344 a(n) = 1 if n is x * A005383(i), where x is either 2, 3, 8, 9 or 15 and i > 2 [i.e., A005383(i) > 5], otherwise 0. 3
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 OFFSET 1 LINKS Antti Karttunen, Table of n, a(n) for n = 1..100000 Index entries for characteristic functions PROG (PARI) A354344(n) = { if(!(n%15), n/=15, if(!(n%9), n/=9, if(!(n%8), n/=8, if(!(n%3), n/=3, if(!(n%2), n/=2, return(0)))))); ((n>5) && isprime(n) && isprime((1+n)/2)); }; CROSSREFS Characteristic function of A354345. Cf. A005383. Sequence in context: A369058 A277165 A011740 * A085974 A011739 A023975 Adjacent sequences: A354341 A354342 A354343 * A354345 A354346 A354347 KEYWORD nonn AUTHOR Antti Karttunen, May 25 2022 STATUS approved

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Last modified July 25 04:49 EDT 2024. Contains 374586 sequences. (Running on oeis4.)