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 A153470 #9 Apr 07 2021 19:45:26 %S A153470 1,30,3750,1953750,4242798750,38404604583750,1448977637979903750, %T A153470 227870224522898915943750,149369176223578379939728893750, %U A153470 408114381491174443782294469248048750,4647830909678374872940213803359098309308750 %N A153470 1/7 of the number of 7-colorings of a planar n X n X n triangular grid. %Y A153470 7th row of A182797/7. %K A153470 nonn %O A153470 1,2 %A A153470 _R. H. Hardin_, Dec 27 2008 %E A153470 a(8)-a(11) from _Alois P. Heinz_, Dec 03 2010