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 A165440 Primes p such that 3+2*(sum of digits of p) is not a prime. 2
 3, 29, 47, 79, 83, 97, 137, 173, 191, 227, 263, 277, 281, 317, 349, 353, 367, 439, 443, 457, 461, 547, 599, 619, 641, 673, 691, 709, 727, 797, 821, 853, 887, 907, 911, 977, 1019, 1069, 1087, 1091, 1109, 1163, 1181, 1217, 1249, 1307, 1361, 1429, 1433, 1447 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Bruno Berselli, Table of n, a(n) for n = 1..1000 EXAMPLE 1087 is in the sequence because 1+0+8+7=16 and 2*16+3=35 is not prime. MATHEMATICA Select[Prime[Range[250]], !PrimeQ[2*Total[IntegerDigits[#]]+3]&] (* Harvey P. Dale, Jul 15 2014 *) PROG (Magma) [ p: p in PrimesUpTo(1500) | not IsPrime(q) where q is 3+2*(&+Intseq(p))]; // Bruno Berselli, Jul 15 2011 CROSSREFS Cf. A165439, A007605. Sequence in context: A341210 A106979 A087209 * A072306 A303137 A364076 Adjacent sequences: A165437 A165438 A165439 * A165441 A165442 A165443 KEYWORD nonn,base AUTHOR Vincenzo Librandi, Sep 19 2009 EXTENSIONS Keyword:base added by R. J. Mathar, Sep 21 2009 STATUS approved

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Last modified October 2 23:30 EDT 2023. Contains 365841 sequences. (Running on oeis4.)