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 A104864 #2 Mar 30 2012 17:26:12 %S A104864 0,0,1,3,3,8,16,19,28,35,52,62,88,115,148,195,245,319,402,513,656,841, %T A104864 1067,1363,1732,2213,2818,3585,4569,5807,7396,9411 %N A104864 "Floor of hypotenuse": a(n)=A104863(n)-10*A104803(n). %Y A104864 Cf. A104803, A104804, A104805, A104806, A104863. %K A104864 nonn %O A104864 0,4 %A A104864 _Zak Seidov_, Mar 28 2005