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 A276490 #36 Sep 09 2016 14:41:00
%S A276490 0,1,6,543,3323092,3617739047205,1300400946990709367556,
%T A276490 243871405119475828112307128378587,
%U A276490 34439765790040491446227712415465752285191304328,4981962825852754222934017283812757768035873070500785373442371593
%N A276490 Number of paths starting at {n}^n to a border position where one component equals 0 using steps that decrement one component by 1.
%F A276490 a(n) = A210472(n,n).
%Y A276490 Main diagonal of A210472.
%K A276490 nonn
%O A276490 0,3
%A A276490 _Alois P. Heinz_, Sep 09 2016