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 A082697 Numbers k such that (4*10^(k-1) - 7)/3 is a plateau prime. 25
 3, 5, 7, 95, 161, 361, 1471, 2899, 3095, 3113, 15699, 17957, 42263, 111033 (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 - 131. Makoto Kamada, Prime numbers of the form 133...331. FORMULA a(n) = A056244(n+1) + 2. EXAMPLE k=7 -> (4*10^(7-1) - 7)/3 = 1333331. CROSSREFS Cf. A056244, A068645, A082698-A082720. Sequence in context: A153138 A201270 A160360 * A051345 A242387 A104388 Adjacent sequences: A082694 A082695 A082696 * A082698 A082699 A082700 KEYWORD nonn,base AUTHOR Patrick De Geest, Apr 13 2003 EXTENSIONS a(13)=42263 from Patrick De Geest, Oct 03 2004 a(14)=111033 from Ray Chandler, Apr 14 2011 Edited by Ray Chandler, Nov 04 2014 STATUS approved

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Last modified November 27 13:09 EST 2022. Contains 358405 sequences. (Running on oeis4.)