%I #23 Nov 04 2019 02:21:32
%S 3,5,7,95,161,361,1471,2899,3095,3113,15699,17957,42263,111033
%N Numbers k such that (4*10^(k-1) - 7)/3 is a plateau prime.
%C Prime versus probable prime status and proofs are given in the author's table.
%D C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 1996-97, pp. 1-9.
%H Patrick De Geest, <a href="http://www.worldofnumbers.com/deplat.htm#pdp131">PDP Reference Table - 131</a>.
%H Makoto Kamada, <a href="https://stdkmd.net/nrr/1/13331.htm#prime">Prime numbers of the form 133...331</a>.
%H <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>.
%F a(n) = A056244(n+1) + 2.
%e k=7 -> (4*10^(7-1) - 7)/3 = 1333331.
%Y Cf. A056244, A068645, A082698-A082720.
%K nonn,base
%O 1,1
%A _Patrick De Geest_, Apr 13 2003
%E a(13)=42263 from _Patrick De Geest_, Oct 03 2004
%E a(14)=111033 from _Ray Chandler_, Apr 14 2011
%E Edited by _Ray Chandler_, Nov 04 2014
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