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 A166771 #8 Dec 12 2024 14:53:47 %S A166771 10,132,1618,18584,206392,2247486,24057962,253872596,2646985492, %T A166771 27314646774,279336752042,2834216781868,28557453089020, %U A166771 285979131364722,2848221941695166,28228788045963448,278553921030487780,2737889369953658314,26815069186724304206,261785062066218670340 %N A166771 Number of n X 6 1..2 arrays containing at least one of each value, and all equal values connected. %H A166771 Andrew Howroyd, <a href="/A166771/b166771.txt">Table of n, a(n) for n = 1..200</a> %e A166771 Some solutions for n=3 %e A166771 ...1.1.1.1.1.2...2.2.2.2.2.1...2.2.2.2.2.2...2.2.2.2.1.1...2.2.2.2.2.2 %e A166771 ...1.1.2.1.1.2...2.2.2.1.2.1...2.1.1.2.2.2...1.1.1.2.2.1...2.1.1.2.1.2 %e A166771 ...2.2.2.2.2.2...2.2.2.1.1.1...1.1.1.1.1.1...1.1.1.1.1.1...2.2.1.1.1.2 %e A166771 ------ %e A166771 ...2.2.2.2.1.1...1.1.1.1.1.1...2.2.1.1.2.2...2.2.1.1.1.2...1.1.1.1.1.1 %e A166771 ...2.2.2.2.1.1...1.1.1.1.1.1...2.2.2.2.2.2...2.1.1.1.1.2...1.1.1.2.2.2 %e A166771 ...2.2.1.1.1.1...1.2.2.2.1.1...2.2.2.2.2.2...2.2.2.2.2.2...1.1.1.1.1.1 %Y A166771 Twice row 6 of A378932. %K A166771 nonn %O A166771 1,1 %A A166771 _R. H. Hardin_, Oct 21 2009 %E A166771 a(7) onwards from _Andrew Howroyd_, Dec 12 2024