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 A158314 Consider a twin prime pair (p, q=p+2) such that the number of prime digits in p is equal to the number of odd digits in q; sequence lists values of p. 0
 3, 5, 59, 281, 347, 521, 599, 659, 821, 857, 1277, 1427, 2081, 2381, 2729, 2801, 3251, 3359, 3467, 3539, 3557, 3767, 3821, 4127, 4217, 4229, 4241, 4271, 4337, 4421, 4547, 4637, 4721, 4787, 4799, 5021, 5231, 5477, 5639, 5657, 5867, 5879, 6359, 6659, 6779 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..45. MATHEMATICA npdQ[{m_, n_}]:=Module[{r=Count[IntegerDigits[m], _?PrimeQ]}, n-m==2&&r==Count[IntegerDigits[n], _?OddQ]]; Select[Partition[ Prime[ Range[ 1000]], 2, 1], npdQ][[All, 1]] (* Harvey P. Dale, May 18 2019 *) CROSSREFS Cf. A001359. Sequence in context: A337924 A049190 A174920 * A249011 A261533 A118477 Adjacent sequences: A158311 A158312 A158313 * A158315 A158316 A158317 KEYWORD nonn,base,less AUTHOR Juri-Stepan Gerasimov, Mar 16 2009 EXTENSIONS Better definition from and data corrected (2381 to 3359 inserted) by R. J. Mathar, May 19 2010 Definition edited by N. J. A. Sloane, May 18 2019 STATUS approved

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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)