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A030463 Previous palindromic prime concatenated with this palindromic prime is prime. 0

%I

%S 3,32323,33533,37573,38083,79397,1123211,1126211,1163611,1180811,

%T 1268621,1276721,1317131,1338331,1447441,1550551,1565651,1609061,

%U 1764671,1829281,1895981,3236323,3563653,3627263,7065607,7087807

%N Previous palindromic prime concatenated with this palindromic prime is prime.

%t palQ[n_]:=Module[{idn=IntegerDigits[n]},idn==Reverse[idn]]; Transpose[ Select[ Partition[Select[Prime[Range[500000]],palQ],2,1],PrimeQ[ FromDigits[ Flatten[IntegerDigits/@#]]]&]][[2]] (* _Harvey P. Dale_, Dec 25 2012 *)

%K nonn,base

%O 0,1

%A _Patrick De Geest_

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Last modified June 24 21:50 EDT 2021. Contains 345433 sequences. (Running on oeis4.)