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 A049349 #6 Mar 31 2012 13:19:59 %S A049349 1,7,29,103,405,1599,6141,23863,92773,359791,1396493,5421415,21041397, %T A049349 81670431,317005341,1230432919,4775854213,18537264079,71951401517, %U A049349 279275580103,1083993881877,4207466012031,16331061009213 %N A049349 Row sums of triangle A049325. %C A049349 p(3,x) is row polynomial corresponding to triangle row A033842(3,m). %H A049349 W. Lang, <a href="http://www.cs.uwaterloo.ca/journals/JIS/index.html">On generalizations of Stirling number triangles</a>, J. Integer Seqs., Vol. 3 (2000), #00.2.4. %F A049349 G.f.: x*(1+6*x+16*x^2+16*x^3)/(1-x-6*x^2-16*x^3-16*x^4) = x*p(3, x)/(1-x*p(3, x)) with x*p(3, x) G.f. for first column of A049325. %K A049349 easy,nonn %O A049349 1,2 %A A049349 _Wolfdieter Lang_