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 A153418 Primes p such that p+18 is also prime. 14
 5, 11, 13, 19, 23, 29, 41, 43, 53, 61, 71, 79, 83, 89, 109, 113, 131, 139, 149, 163, 173, 179, 181, 193, 211, 223, 233, 239, 251, 263, 293, 313, 331, 349, 379, 383, 401, 421, 431, 439, 443, 449, 461, 491, 503, 523, 569, 599, 601, 613, 641, 643, 659, 673, 683 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Both p and p+18 have the same digital root (A010888). - Zak Seidov, Sep 14 2015 No term belongs to A030432. - Michel Marcus, Sep 14 2015 No term belongs to A045437. - Bruno Berselli, Sep 14 2015 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 EXAMPLE 5 is in sequence because 5+18=23 is also prime; 11 is in sequence because 11+18=29 is also prime. MATHEMATICA lst={}; d=18; Do[p=Prime[n]; If[PrimeQ[p+d], AppendTo[lst, p]], {n, 6!}]; lst Select[Prime[Range[150]], PrimeQ[(# + 18)]&] (* Vincenzo Librandi, Apr 14 2013 *) PROG (Magma) [p: p in PrimesUpTo(1000) | IsPrime(p+18)]; // Vincenzo Librandi, Apr 14 2013 (PARI) list(n)=forprime(p=1, n, if(isprime(p+18), print1(p", "))) \\ Anders Hellström, Sep 13 2015 (Sage) [p for p in primes(700) if is_prime(p+18)]; # Bruno Berselli, Sep 14 2015 CROSSREFS Cf. A007953, A010888, A045437, A049488, A030432, A153417. A031936 is a subsequence. - Zak Seidov, Sep 13 2015 Sequence in context: A087490 A140565 A191072 * A079019 A191034 A340466 Adjacent sequences: A153415 A153416 A153417 * A153419 A153420 A153421 KEYWORD nonn,easy AUTHOR Vladimir Joseph Stephan Orlovsky, Dec 25 2008 EXTENSIONS Definition improved by Bruno Berselli, Oct 31 2012 STATUS approved

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Last modified October 3 06:07 EDT 2023. Contains 365842 sequences. (Running on oeis4.)