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 A114221 #16 Dec 22 2021 10:20:50 %S A114221 3,7,15,24,45,76,161,309,456,55621039 %N A114221 Numbers m such that A114216(m)=3. %C A114221 a(11) (if it exists) > 37607912018. - _Hiroaki Yamanouchi_, Sep 24 2014 %Y A114221 Cf. A114216, A114218. %Y A114221 Numbers m such that A114216(m)=k: A114217 (k=1), A114222 (k=7), A114223 (k=11), A114224 (k=17). %K A114221 nonn,more %O A114221 1,1 %A A114221 _Zak Seidov_, Nov 18 2005 %E A114221 a(10) from _Hiroaki Yamanouchi_, Sep 24 2014