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 A080482 #4 Apr 16 2024 22:11:27 %S A080482 0,4,115,2263,337040438,50539060640,7074108084209,943101044111145, %T A080482 121246131347141448,15154916165017175118,1852191953202054212155, %U A080482 222256232357242458252559,26266027276128286229296330 %N A080482 a(n) = A080481(n)/3. %Y A080482 Cf. A080481, A080483, A080484. %K A080482 base,easy,nonn %O A080482 1,2 %A A080482 _Amarnath Murthy_, Mar 11 2003 %E A080482 Corrected and extended by Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003