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 A089685 a={1,3,7,9} p[n]=Prime[n]*10+a[[1+Mod[n,4]]] a(m) = if p[n] is prime, then p[n] 0
 23, 37, 59, 71, 113, 137, 179, 191, 233, 479, 593, 617, 733, 797, 839, 1039, 1093, 1279, 1373, 1499, 1511, 1637, 1931, 1973, 1997, 2273, 2297, 2339, 2579, 2693, 2833, 3079, 3319, 3371, 3539, 3673, 4019, 4091, 4217, 4637, 4679, 4999, 5639, 5879, 6079, 6131 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A prime generator function based on the primes and the digit set {1,3,7,9}. LINKS MATHEMATICA a={1, 3, 7, 9} digits=3*200 b=Table[Prime[n]*10+a[[1+Mod[n, 4]]], {n, 1, digits}] c=Table[If[PrimeQ[b[[n]]]==True, b[[n]], 0], {n, 1, digits}] d=Delete[Union[c], 1] CROSSREFS Sequence in context: A080906 A237766 A215163 * A186883 A068016 A338270 Adjacent sequences:  A089682 A089683 A089684 * A089686 A089687 A089688 KEYWORD nonn AUTHOR Roger L. Bagula, Jan 05 2004 STATUS approved

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Last modified May 19 05:04 EDT 2022. Contains 353826 sequences. (Running on oeis4.)