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 A083053 #8 Dec 02 2016 07:05:26
%S A083053 1,6,16,35,66,114,185,290,443,661,976,1425,2064,2972,4259,6083,8667,
%T A083053 12327,17506,24834,35203,49869,70615,99959,141462,200159,283173,
%U A083053 400577,566616,801435,1133522,1603168,2267350,3206653,4535033,6413648,9070416
%N A083053 Antidiagonal sums of table A083050.
%F A083053 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(2).
%Y A083053 Cf. A083044, A083047, A083050, A083052.
%K A083053 nonn
%O A083053 0,2
%A A083053 _Paul D. Hanna_, Apr 18 2003