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 A244436 #5 Jul 19 2014 09:33:47
%S A244436 4,7,13,14,21,27,28
%N A244436 Numbers n such that A244435(n) is not in the set {A244435(n-1), A244435(n+1)}.
%e A244436 A244435(27)=6118 is not in the set {A244435(26), A244435(28)}={1667, 8249} also A244435(28)=8249 is not in the set {A244435(27), A244435(29)}={6118, 9098} so 27 and 28 are two terms of this sequence.
%Y A244436 Cf. A244434, A244435.
%K A244436 nonn,more
%O A244436 1,1
%A A244436 _Farideh Firoozbakht_, Jul 19 2014