A251804 Number of (4+1)X(n+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

216912, 18577404, 873945739, 26787273856, 594938582014, 10280556043804, 145329837643171, 1743692215971208, 18257820090771490, 170475350875241504, 1443843489205389919, 11245777833263175252, 81459269805049215890

Offset: 1

Author

R. H. Hardin, Dec 09 2014

Keywords

• nonn

Comments

Row 4 of A251801

Examples

			Some solutions for n=1
..0..0....0..1....0..2....2..2....2..2....2..3....0..2....0..3....0..2....0..2
..1..1....2..3....1..0....0..2....2..3....2..3....2..3....3..2....0..2....1..1
..2..3....3..3....0..1....0..0....3..2....0..2....0..3....0..1....0..3....3..3
..0..2....2..3....0..3....3..3....2..3....0..0....1..1....0..3....3..1....2..2
..2..0....0..2....1..0....3..3....0..1....0..0....0..2....3..2....0..2....3..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 52

Formula

Empirical recurrence of order 52 (see link above)