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A281496 Numbers n such that the decimal representation of the Elias delta code of n is a palindromic prime. 1

%I #14 Mar 30 2017 15:29:19

%S 133,18279,19279,24279,25279,30379,263213,323213,333213,374213,384213,

%T 404213,33907213,35117213,37037213,37237213,37537213,39757213,

%U 41377213,42088213,42188213,43498213,43598213,45518213,46328213,47138213,48958213,49258213,49658213,51478213,51989213,52289213,54109213,55019213,58049213

%N Numbers n such that the decimal representation of the Elias delta code of n is a palindromic prime.

%C Numbers n such that A003188(n) is in A002385.

%C a(n) is always odd.

%H Indranil Ghosh, <a href="/A281496/b281496.txt">Table of n, a(n) for n = 1..100</a>

%H Indranil Ghosh, <a href="/A281496/a281496_1.txt">Python program to generate the sequence</a>

%e 133 is in the sequence because the decimal representation of its Elias delta code is 14341 which is both prime and palindromic.

%e 18279 is in the sequence because the decimal representation of its Elias delta code is 1951591 and 1951591 is both prime and palindromic.

%Y Cf. A002385, A281225, A281382.

%K nonn,base

%O 1,1

%A _Indranil Ghosh_, Jan 23 2017

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Last modified August 13 11:14 EDT 2024. Contains 375130 sequences. (Running on oeis4.)