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 A059484 #7 Jun 29 2017 08:01:24 %S A059484 1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,3,0,0,0,0,0,1,1,0,0,0,0,0,0,5,0, %T A059484 0,0,0,0,0,0,1,5,0,0,0,0,0,0,0,0,7,1,0,0,0,0,0,0,0,0,1,13,0,0,0,0,0,0, %U A059484 0,0,0,0,9,7,0,0,0,0,0,0,0,0,0,0,1,25,1,0,0,0,0,0,0 %N A059484 Triangle T(n,k) = coefficient of x^n*y^k in 1/(1-x*y-x*y^2-x^2*y^3), read by rows in order 00, 10, 01, 20, 11, 02, ... %H A059484 R. C. Read, <a href="http://cms.math.ca/cjm/v14/cjm1962v14.0001-0020.pdf">Contributions to the cell growth problem</a>, Canad. J. Math., 14 (1962), 1-20. %p A059484 read transforms; 1/(1-x*y-x*y^2-x^2*y^3); SERIES2(%,x,y,12): SERIES2TOLIST(%,x,y,12); %Y A059484 Row sums: A079973. %K A059484 nonn,tabl,easy %O A059484 0,19 %A A059484 _N. J. A. Sloane_, Feb 04 2001