# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a164763 Showing 1-1 of 1 %I A164763 #3 Mar 31 2012 12:35:35 %S A164763 225,11786,265155,4434848,63388030 %N A164763 Number of nX6 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value %e A164763 Some solutions for n=3 %e A164763 ...1.1.2.2.2.2...1.1.2.2.2.2...1.1.1.2.2.2...1.1.1.2.2.2...1.1.2.2.2.2 %e A164763 ...3.3.3.2.2.2...1.1.3.2.2.2...1.1.1.2.4.2...3.3.3.2.4.4...1.1.1.2.2.2 %e A164763 ...3.3.3.3.4.4...3.3.3.4.4.4...3.3.3.3.4.4...3.3.3.4.4.4...3.3.3.4.4.4 %e A164763 ------ %e A164763 ...1.1.2.2.2.2...1.1.2.2.2.2...1.1.2.2.2.2...1.1.1.2.2.2...1.1.1.2.2.2 %e A164763 ...3.1.3.2.2.4...1.1.1.4.4.4...3.3.3.4.4.4...3.1.3.4.2.4...1.1.3.2.2.4 %e A164763 ...3.3.3.3.4.4...3.3.4.4.4.4...3.3.3.3.4.4...3.3.3.4.4.4...3.3.3.3.4.4 %K A164763 nonn %O A164763 2,1 %A A164763 _R. H. Hardin_ Aug 24 2009 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE