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 A089686 a={1,3,7,9} b[n]=Prime[n]*10+a[[4-Mod[n,4]]] c(m) =if b[n] is prime then b[n] 0
 79, 199, 293, 311, 379, 433, 613, 719, 977, 1013, 1031, 1097, 1319, 1993, 2111, 2239, 2293, 2399, 2417, 2713, 2819, 2837, 3119, 3137, 3677, 3733, 4099, 4339, 4397, 4799, 4877, 5039, 5231, 5419, 5477, 5573, 5717, 5939, 6311, 6473, 6599, 6733, 6917, 7013 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Reverse digit set function that produces a prime sequence. LINKS MATHEMATICA a={1, 3, 7, 9} digits=3*200 b=Table[Prime[n]*10+a[[4-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: A191227 A142747 A142198 * A278837 A260335 A257933 Adjacent sequences:  A089683 A089684 A089685 * A089687 A089688 A089689 KEYWORD nonn AUTHOR Roger L. Bagula, Jan 05 2004 STATUS approved

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Last modified April 22 04:39 EDT 2019. Contains 322329 sequences. (Running on oeis4.)