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%I #20 Jun 26 2024 21:54:43
%S 2,70207,357020753,9635702075369,33963570207536933,
%T 723396357020753693327,1272339635702075369332721,
%U 97127233963570207536933272179,119712723396357020753693327217911,9011971272339635702075369332721791109,33901197127233963570207536933272179110933
%N First highest palindromic prime pyramid with a(1)=2 such that (number of digits in a(n+1)) = (number of digits in a(n)) + 4.
%C There are 2 such highest "Palindromic prime pyramid" (beginning with 2) with 26 elements.
%D G. L. Honaker Jr. and C. Caldwell, Palindromic prime pyramids, J. Recreational Mathematics, vol. 30.3, 1999-2000, pp. 169-176.
%D J.-P. Delahaye, "Pour la science", (French edition of Scientific American), Juin 2002, p. 99
%H Sean A. Irvine, <a href="/A071067/b071067.txt">Table of n, a(n) for n = 1..26</a>
%Y Cf. A070927, A070922.
%K fini,full,nonn,base,changed
%O 1,1
%A _Benoit Cloitre_, May 26 2002
%E More terms from _Sean A. Irvine_, Jun 26 2024
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