This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A178584 #3 Mar 31 2012 10:26:16 %S A178584 10321,11731,12841,10781,14081,13591,16481,17491,32563,31873,31193, %T A178584 31393,32783,34583,70327,72047,71257,70667,76387,76487,77797,90089, %U A178584 92369,90989,95279,95479,1023601,1013321,1055321,1130711,1040821 %N A178584 Smallest emirp corresponding to the prime of A178583. %e A178584 a(4)= 10781 belongs to the emirp pair (10781, 18701) whose average is the palindromic prime 14741 = A178581(4) which is also the arithmetic mean of the other emirp pair (13751, 15731). %K A178584 nonn,base %O A178584 1,1 %A A178584 _Lekraj Beedassy_, May 29 2010 %E A178584 Extended by _Ray Chandler_, Jul 05 2010