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 A086657 #3 Oct 01 2013 17:57:41 %S A086657 2,1,8,8,4,6,1,9,9,4,2,4,8,6,2,3,9,4,3,8,8,2,4,6,4,0,4,6,8,6,8,8,9,9, %T A086657 7,0,6,6,1,1,9,6,3,8,2,3,5,2,2,7,2,5,9,1,5,4,8,8,3,5,4,5,9,2,1,6,0,0, %U A086657 3,7,1,4,6,5,8,7,3,0,2,9,6,9,2,6,2,8,7,8,7,2,7,9,5,7,4,7,9,7,4,9 %N A086657 Write decimal expansion of e in triangular form; sequence gives right edge. %e A086657 Triangle is %e A086657 2 %e A086657 71 %e A086657 828 %e A086657 1828 %e A086657 45904 %e A086657 523536 %e A086657 0287471 %e A086657 35266249 %e A086657 775724709 %e A086657 3699959574 %e A086657 96696762772 %e A086657 407663035354 %Y A086657 Cf. A083437, A086639. %K A086657 easy,nonn,base %O A086657 1,1 %A A086657 _Cino Hilliard_, Jul 27 2003