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 A220451 #6 May 23 2014 11:17:49 %S A220451 1,1,4,3,1,5,2,5,5,6,1,5,4,3,4,4,2,5,4,6,1,6,6,3,4,6,2,5,2,2,1,6,2,3, %T A220451 4,3,3,5,2,3,1,6,1,1,4,3,1,5,2,5,5,6,1,5,4,3,4,4,2,5,4,6,1,6,6,3,4,6, %U A220451 2,5,2,2,1,6,2,3,4,3,3,5,2,3,1,6,1,1,4,3,1,5 %N A220451 A220449(n) mod 7. %H A220451 V. H. Moll, <a href="http://www.tulane.edu/~vhm/papers_html/xn-final.pdf">An arithmetic conjecture on a sequence of arctangent sums</a>, 2012. %Y A220451 Cf. A220449, A220450, A220451. %K A220451 nonn %O A220451 1,3 %A A220451 _N. J. A. Sloane_, Dec 22 2012