login
Number of 7Xn 0..2 arrays with rows unimodal and antidiagonals nondecreasing
1

%I #6 Aug 11 2014 22:45:51

%S 2187,419904,9588028,86251004,495660330,2231009824,8684742989,

%T 30944246553,104711652679,344919346826,1122234055919,3627085766299,

%U 11631834618628,36830849015498,114465864361342,347386072561498

%N Number of 7Xn 0..2 arrays with rows unimodal and antidiagonals nondecreasing

%C Row 7 of A224374

%H R. H. Hardin, <a href="/A224379/b224379.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A224379/a224379.txt">Empirical polynomial of degree 28</a>

%F Empirical polynomial of degree 28 (see link above)

%e Some solutions for n=3

%e ..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

%e ..0..0..1....0..0..0....0..0..1....0..0..1....0..0..1....1..0..0....0..0..0

%e ..0..1..1....0..1..0....0..1..0....0..1..0....0..1..0....0..0..0....0..0..0

%e ..2..2..2....2..0..0....1..0..0....1..2..0....1..1..0....1..1..0....2..1..0

%e ..2..2..0....0..2..1....1..0..0....2..1..1....1..1..0....1..2..0....1..0..0

%e ..2..1..1....2..2..1....2..0..0....1..2..1....1..0..0....2..0..0....0..1..2

%e ..2..2..0....2..2..0....2..1..0....2..1..0....0..1..0....2..1..0....1..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 05 2013