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 A133010 #9 Mar 30 2012 17:33:49 %S A133010 0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,1,0, %T A133010 0,0,0,1,0,0,1,0,1,0,0,0,0,1,0,1,0,0,1,0,0,1,0,0,1,0,1,0,0,0,1,0,1,0, %U A133010 0,1,0,1,0,0,0,1,1,0 %N A133010 Characteristic function of the Riemann zeta function: If n is a nearest integer to imaginary part of zero, then a(n)=1 else a(n)=0. %C A133010 Also an interesting triangle read by row: See tabl. %H A133010 <a href="/index/Ch#char_fns">Index entries for characteristic functions</a> %H A133010 <a href="/index/Z#zeta_function">Index entries for zeta function</a>. %e A133010 a(30)=1 because 30 is the nearest integer to imaginary part of 4th nontrivial zero of Riemann zeta function. %Y A133010 See A002410 for more information. Cf. A058303, A065434, A065452, A065453. %K A133010 easy,nonn,tabl %O A133010 1,1 %A A133010 _Omar E. Pol_, Sep 13 2007