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%I #13 Sep 08 2022 08:45:10
%S 11411,12421,15451,17471,18481,30403,32423,77477,78487,96469,1074701,
%T 1114111,1134311,1374731,1444441,1464641,1594951,1654561,1684861,
%U 1714171,1734371,1764671,1824281,1884881,1924291,1984891,3064603,3304033
%N Palindromic primes with middle digit 4.
%o (Magma) [ p: p in PrimesUpTo(200000000) | IsOdd(d) and D[(d+1) div 2] eq 4 and D eq Reverse(D) where d is #D where D is Intseq(p) ]; // _Vincenzo Librandi_, Apr 12 2011
%Y Cf. A002385.
%K nonn,base
%O 1,1
%A _Lekraj Beedassy_, Apr 25 2003
%E a(9) from _Vincenzo Librandi_, Apr 12 2011
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