|
%I #4 Dec 18 2015 18:17:24
%S 0,7,44,317,3640,78101
%N Number of n X n 1..2 arrays containing at least one of each value, all equal values connected, and rows considered as a single number in nondecreasing order.
%e Some solutions for n=4
%e ...1.1.1.1...2.1.1.1...2.1.1.1...1.1.1.1...2.1.1.1...1.1.1.1...2.1.1.1
%e ...1.1.1.1...2.1.1.2...2.1.2.1...2.1.1.1...2.1.1.1...1.2.1.1...2.1.1.1
%e ...1.1.1.1...2.1.1.2...2.1.2.1...2.2.2.1...2.1.1.1...2.2.2.1...2.1.1.1
%e ...2.2.2.2...2.2.2.2...2.2.2.2...2.2.2.2...2.2.2.2...2.2.2.1...2.2.1.1
%e ------
%e ...1.1.1.1...2.2.1.1...1.1.1.1...1.1.1.1...1.1.1.1...1.2.2.2...2.1.1.1
%e ...1.2.1.1...2.2.2.1...1.1.1.1...1.2.2.2...1.2.1.1...1.2.2.2...2.1.1.1
%e ...2.2.2.1...2.2.2.1...1.2.1.1...2.2.2.2...1.2.2.1...1.2.2.2...2.2.1.2
%e ...2.2.2.2...2.2.2.2...1.2.2.2...2.2.2.2...1.2.2.2...2.2.2.2...2.2.2.2
%K nonn
%O 1,2
%A _R. H. Hardin_ Oct 21 2009
| 