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 A248894 #11 Nov 28 2020 06:35:41
%S A248894 17,69,70,241,405,2606,3339,4116,7116,15148,15149,20162,137633,324410,
%T A248894 332504,439298,1012547,1121608,2482209,5028662,6330857,7180864,
%U A248894 7180865,9569168,14452770,17021632,110229972,110229973,193329301
%N A248894 Numbers k such that both numbers k and k+1 are in the sequence A248903.
%C A248894 If k is in the set {69, 15148, 7180864, 110229972, ...} then both numbers k and k+1 are in the sequence. This means that k, k+1 and k+2 are in the sequence A248903. It seems that there exist more such numbers k.
%Y A248894 Cf. A001359, A248891, A248903.
%K A248894 nonn,more
%O A248894 1,1
%A A248894 _Jahangeer Kholdi_ and _Farideh Firoozbakht_, Nov 22 2014
%E A248894 a(13)-a(29) from _Jinyuan Wang_, Nov 28 2020