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 A082001 #6 Aug 31 2018 16:51:39 %S A082001 1,5,16,50,118,248,434,713,1121,1624,2236,3158,4266,5486,6828,8344, %T A082001 10186,12006,14517,17225,20373,23907,27864,32150,37172,42199,47955, %U A082001 55292,62232,69367,77019,86160,95069,105458,116291,128018,140178,152692 %N A082001 Sum of n-th antidiagonal of array in A081998. %H A082001 Charlie Neder, <a href="/A082001/b082001.txt">Table of n, a(n) for n = 0..140</a> %Y A082001 Cf. A081998, A081999, A082000. %K A082001 nonn %O A082001 0,2 %A A082001 _Amarnath Murthy_, Apr 05 2003 %E A082001 a(4)-a(37) from _Charlie Neder_, Aug 31 2018