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 A083049 #7 Dec 01 2016 01:35:44
%S A083049 1,5,15,34,68,127,225,387,652,1084,1787,2927,4775,7769,12616,20462,
%T A083049 33160,53709,86962,140769,227834,368711,596658,965488,1562270,2527887,
%U A083049 4090292,6618319,10708756,17327225,28036136,45363522,73399824,118763517
%N A083049 Antidiagonal sums of table A083047.
%F A083049 a(n) = Sum_{k=0..n} T(k, n-k), where T(n, 0) = floor(n*x/(x-1))+1, T(n, k+1) = ceiling(x*T(n, k)), for n>=0, k>=0, with x = (sqrt(5)+1)/2.
%Y A083049 Cf. A083044, A083047, A083050, A083048.
%K A083049 nonn
%O A083049 0,2
%A A083049 _Paul D. Hanna_, Apr 18 2003