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 A082708 Numbers k such that (34*10^(k-1) - 43)/9 is a plateau prime. 1
 3, 15, 55, 69, 85, 87, 157, 2767, 3381, 3877, 5209, 10747, 15769, 31317, 40959, 45805, 46567, 51009, 80163 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Prime versus probable prime status and proofs are given in the author's table. REFERENCES C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 1996-97, pp. 1-9. LINKS Patrick De Geest, PDP Reference Table - 373. Makoto Kamada, Prime numbers of the form 377...773. FORMULA a(n) = A056255(n) + 2. EXAMPLE k=15 -> (34*10^(15-1) - 43)/9 = 377777777777773. CROSSREFS Cf. A082697-A082720, A056255. Sequence in context: A265974 A099581 A026696 * A093925 A117960 A176288 Adjacent sequences:  A082705 A082706 A082707 * A082709 A082710 A082711 KEYWORD nonn,base,hard,more AUTHOR Patrick De Geest, Apr 13 2003 EXTENSIONS Updates from De Geest site by Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008 a(18)=51009 from Ray Chandler, Nov 16 2010 a(19)=80163 from Ray Chandler, Dec 15 2010 Edited by Ray Chandler, Nov 05 2014 STATUS approved

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Last modified February 19 09:55 EST 2020. Contains 332041 sequences. (Running on oeis4.)