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 A275883 #5 Aug 18 2016 16:24:33 %S A275883 1,3,4,6,6,8,10,11,13,14,16,18,16,20,19,22,21,24,26,24,27,29,30,32,35, %T A275883 35,38,40,37,41,43,43,43,43,47,47,47,52,53,51,54,56,58,55,60,59,59,62, %U A275883 64,63,67,66,68,73,74,71,74,73,77,78,75,79,80,87,83,84,86 %N A275883 Maximal element in n-th antidiagonal of A269526. %H A275883 Alois P. Heinz, <a href="/A275883/b275883.txt">Table of n, a(n) for n = 1..1000</a> %Y A275883 Similar to but different from A274529. %Y A275883 Cf. A269526. %K A275883 nonn %O A275883 1,2 %A A275883 _N. J. A. Sloane_, Aug 18 2016