%I A052091
%S A052091 2,7,3,33,9,30,18,92,3,133,18,117,17,15,346,93,33,180,120,194,126,336,
%T A052091 331,330,95,12,118,369,39,32,165,313,165,134,13,149,195,145,158,720,18,
%U A052091 396,193,102,737,964,722,156,106,395,945,303,310,113,150,303,715,123
%N A052091 Left parts needed for the construction of the palindromic prime pyramid 
               starting with 2.
%C A052091 Each term is the smallest to have the previous term as a centered substring, 
               beginning with the smallest palindromic prime 2. The right parts 
               are the reversals of the above terms leading zeros included. The 
               terms from a(34) onward are currently only proved for strongpseudoprime.
%H A052091 P. De Geest, <a href="http://www.worldofnumbers.com/palprim3.htm">World!Of 
               Palindromic Primes, Page 3</a>
%e A052091 Start with 2; add 7 gives 727; add 3 gives 37273; add 33 gives 333727333; 
               etc.
%Y A052091 Cf. A053600, A052092, A047076.
%Y A052091 Sequence in context: A112303 A089124 A117809 this_sequence A090276 A090564 
               A079072
%Y A052091 Adjacent sequences: A052088 A052089 A052090 this_sequence A052092 A052093 
               A052094
%K A052091 nonn,base
%O A052091 0,1
%A A052091 Patrick De Geest (pdg(AT)worldofnumbers.com), Jan 15 2000.
%E A052091 Comments from G. L. Honaker, Jr. (honak3r(AT)gmail.com), Mar 30 2000.