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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A226017 Primes such that sum of odd digits is also prime. 0 3, 5, 7, 11, 23, 43, 47, 67, 83, 101, 113, 131, 137, 139, 151, 157, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 263, 283, 311, 313, 317, 331, 337, 353, 359, 373, 379, 397, 443, 463, 467, 487, 557, 571, 577, 593, 599, 607, 643, 647, 683, 719, 733, 739 (list; graph; refs; listen; history; text; internal format) OFFSET 1,1 COMMENTS Primes such that A104260(n) is prime. LINKS Table of n, a(n) for n=1..54. EXAMPLE 181 is a member since sum of odd digits=2. MATHEMATICA soQ[n_]:=PrimeQ[Total[Select[IntegerDigits[n], OddQ[#] &]]]; Select[Prime[Range[132]], soQ[#] &] CROSSREFS Cf. A071649, A104260. Sequence in context: A038890 A227240 A360567 * A303705 A309520 A344411 Adjacent sequences: A226014 A226015 A226016 * A226018 A226019 A226020 KEYWORD nonn,base,less AUTHOR Jayanta Basu, May 23 2013 STATUS approved

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Last modified August 18 23:41 EDT 2024. Contains 375284 sequences. (Running on oeis4.)