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 A107223 #4 Jun 08 2014 15:24:14 %S A107223 9,18,28,37,47,56,65,78,87,97,106,116,125,135,147,157,166,175,185,194, %T A107223 204,216,226,235,245,254,263,273,285,295,304,314,323,333,342,354,364, %U A107223 373,383,392,402,411,424,433,442,452,461,471,480,493,502,512,521,530 %N A107223 Floor(Pi*Floor(n*Pi)). %H A107223 N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references) %F A107223 a(n)=floor(Pi*A022844(n)) %Y A107223 Cf. A022844. %K A107223 nonn %O A107223 1,1 %A A107223 _Zak Seidov_, Jun 08 2005