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 A153472 #9 Apr 07 2021 19:45:04 %S A153472 1,56,19208,40356008,519359253560,40941262367510120, %T A153472 19769162164304264642504,58472138404795144043227508456, %U A153472 1059359506545823729966428034297457864,117563210619769003021098235186555283816605208 %N A153472 1/9 of the number of 9-colorings of a planar n X n X n triangular grid. %Y A153472 9th row of A182797/9. %K A153472 nonn %O A153472 1,2 %A A153472 _R. H. Hardin_, Dec 27 2008 %E A153472 a(8)-a(10) from _Alois P. Heinz_, Dec 03 2010