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A050786 Palindromic primes containing at least one pair of consecutive equal digits. 1

%I #13 Aug 19 2021 06:18:14

%S 11,11311,11411,13331,15551,16661,19991,33533,72227,75557,76667,77377,

%T 77477,77977,78887,79997,1003001,1008001,1022201,1055501,1114111,

%U 1117111,1120211,1123211,1126211,1129211,1134311,1145411,1150511

%N Palindromic primes containing at least one pair of consecutive equal digits.

%t Select[Prime[Range[89500]],Reverse[x=IntegerDigits[#]]==x&&MemberQ[Differences[x],0]&] (* _Jayanta Basu_, Jun 01 2013 *)

%Y Cf. A002385, A050785, A050784, A050758.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Sep 15 1999

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Last modified May 7 04:34 EDT 2024. Contains 372300 sequences. (Running on oeis4.)