A251804 - OEIS

%I #6 Jun 02 2025 10:32:38

%S 216912,18577404,873945739,26787273856,594938582014,10280556043804,

%T 145329837643171,1743692215971208,18257820090771490,

%U 170475350875241504,1443843489205389919,11245777833263175252,81459269805049215890

%N Number of (4+1)X(n+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

%C Row 4 of A251801

%H R. H. Hardin, <a href="/A251804/b251804.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A251804/a251804.txt">Empirical recurrence of order 52</a>

%F Empirical recurrence of order 52 (see link above)

%e Some solutions for n=1

%e ..0..0....0..1....0..2....2..2....2..2....2..3....0..2....0..3....0..2....0..2

%e ..1..1....2..3....1..0....0..2....2..3....2..3....2..3....3..2....0..2....1..1

%e ..2..3....3..3....0..1....0..0....3..2....0..2....0..3....0..1....0..3....3..3

%e ..0..2....2..3....0..3....3..3....2..3....0..0....1..1....0..3....3..1....2..2

%e ..2..0....0..2....1..0....3..3....0..1....0..0....0..2....3..2....0..2....3..3

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 09 2014