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 A212719 #15 Aug 31 2012 13:45:57
%S A212719 2,6,14,16,18,20,22,24,26,28,30,32,44,48,54,56,58,60,70,72,74,76,84,
%T A212719 86,90,100,122,124,128,130,132,134,136,138,142,144,192,206,208,210,
%U A212719 212,214,216,218,220,222,224,234,236,238,240,254,256,258,282,284,286
%N A212719 Numbers n with property that the subset A039703(1..n) contains equal numbers of odd and even terms.
%C A212719 It appears that the sequence is infinite and unbound.
%Y A212719 Cf. A039703, A096629.
%Y A212719 Cf. A045356 (primes congruent to {0,2,4} mod 5).
%Y A212719 Cf. A045429 (primes congruent to {1,3} mod 5).
%K A212719 nonn
%O A212719 1,1
%A A212719 _Zak Seidov_, Aug 29 2012