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 A153468 #11 Apr 07 2021 19:45:43 %S A153468 1,12,324,19764,2727756,852196788,602756140068,965229960414132, %T A153468 3499562183624643780,28727144381588600187612, %U A153468 533909545388896809071238444,22466716989986988610061264294004,2140465899840618529308907998923768676 %N A153468 1/5 of the number of 5-colorings of a planar n X n X n triangular grid. %Y A153468 5th row of A182797/5. %K A153468 nonn %O A153468 1,2 %A A153468 _R. H. Hardin_, Dec 27 2008 %E A153468 a(10)-a(11) from _Alois P. Heinz_, Dec 03 2010 %E A153468 a(12)-a(13) from _Alois P. Heinz_, Jul 21 2011