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A088290 Prime numbers in which the sum of the external digits = the sum of the internal digits. 0

%I #7 Dec 05 2013 19:56:34

%S 1021,1087,1201,1223,1289,1447,1559,1627,2053,2143,2389,2503,2659,

%T 2749,3041,3221,3467,3557,3917,4051,4073,4231,4253,4297,4523,4567,

%U 4657,4679,4703,5443,5623,5689,5779,5869,6521,6701,6857,6947,7193,7283,7351,7621

%N Prime numbers in which the sum of the external digits = the sum of the internal digits.

%e 1021 is a member 1+1 = 0+2 = 2..

%t edidQ[n_]:=Module[{idn=IntegerDigits[n]},idn[[1]]+idn[[-1]]==Total[Most[ Rest[idn]]]]; Select[Prime[Range[169,3000]],edidQ] (* _Harvey P. Dale_, Apr 20 2012 *)

%Y Cf. A076167.

%K base,nonn

%O 0,1

%A _Amarnath Murthy_, Sep 29 2003

%E More terms from _David Wasserman_, Aug 04 2005

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Last modified April 16 03:28 EDT 2024. Contains 371696 sequences. (Running on oeis4.)