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 A083045 #8 Jun 16 2019 08:06:57 %S A083045 1,6,17,35,68,122,224,383,656,1092,1841,2978,4859,7835,12776,20291, %T A083045 32664,51422,82485,129720,204821,319482,506060,789872,1237733,1927494, %U A083045 3024318,4687259,7274921,11271293,17578760,27133793,42125475,64909160 %N A083045 Main diagonal of table A083044. %F A083045 a(n) = T(n, n), 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=3/2. %Y A083045 Cf. A083044, A083047, A083050, A083046. %K A083045 nonn %O A083045 0,2 %A A083045 _Paul D. Hanna_, Apr 18 2003