A216933 - OEIS

%I #4 Sep 20 2012 15:29:56

%S 5,606,175869,64697626,25604764159,10284525151080,4096557367365808,

%T 1603120459023088062,614279244262328965406,230325185716748014038168,

%U 84558986910490382000466700,30431723356332792599455512216

%N Number of side-n hexagonal 0..4 arrays with values nondecreasing E, SW and SE

%C Column 4 of A216937

%H R. H. Hardin, <a href="/A216933/b216933.txt">Table of n, a(n) for n = 1..13</a>

%e Some solutions for n=3

%e ......0.0.1..........0.0.0..........0.0.0..........0.0.0..........0.0.0

%e .....0.1.1.3........0.1.1.2........0.0.0.1........0.0.1.1........0.0.1.1

%e ....0.1.1.3.3......1.1.2.3.3......0.1.1.4.4......0.0.1.1.4......1.1.1.1.2

%e .....1.2.3.4........2.2.4.4........2.2.4.4........0.3.4.4........2.2.3.4

%e ......3.3.4..........2.4.4..........2.4.4..........3.4.4..........3.4.4

%K nonn

%O 1,1

%A _R. H. Hardin_ Sep 20 2012