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 A153467 #10 Apr 07 2021 19:45:51 %S A153467 1,6,48,528,8160,179520,5666304,257819136,16962407424,1617060046848, %T A153467 223709857824768,44962767953608704,13140310268741124096, %U A153467 5587767779596757434368,3459297434976642415460352 %N A153467 1/4 of the number of 4-colorings of a planar n X n X n triangular grid. %Y A153467 4th row of A182797/4, A182798/4. %K A153467 nonn %O A153467 1,2 %A A153467 _R. H. Hardin_, Dec 27 2008 %E A153467 a(14) from _Alois P. Heinz_, Dec 03 2010 %E A153467 a(15) from _Alois P. Heinz_, Mar 11 2016