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 A030625 #5 Jul 08 2025 19:34:26 %S A030625 0,2,6,12,24,40,72,126,240,459,940,1936,4104,8671,18508,39300,83616, %T A030625 177055,374652,789811,1662400,3488877,7309588,15279406,31886928, %U A030625 66422275,138157708,286924599,595102144,1232672869 %N A030625 n(n+Z(n)), where Z( ) is the Narayana-Zidek-Capell sequence (A002083). %Y A030625 Cf. A002083. %K A030625 nonn %O A030625 0,2 %A A030625 _N. J. A. Sloane_