A206251 Number of (n+1)X5 0..3 arrays with every 2X2 subblock having zero permanent.

9409, 1718209, 49336576, 4556324929, 226637884225, 16533087493120, 1006239668280961, 68438717405988481, 4427204221759169536, 295306870252087238017, 19431114832514090805121, 1289257317404589497597440

Offset: 1

Author

R. H. Hardin Feb 05 2012

Keywords

• nonn

Comments

Column 4 of A206255

Examples

			Some solutions for n=4
..3..3..2..3..0....3..1..1..2..0....0..1..0..2..3....2..1..3..3..1
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..3..0..0..0..3....1..2..1..1..3....0..0..3..2..3....0..1..0..2..2
..2..0..2..0..3....0..0..0..0..0....1..0..0..0..0....0..1..0..0..0
..3..0..3..0..0....2..1..1..2..1....0..0..0..1..1....0..1..0..1..3
		

Links

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

Formula

Empirical: a(n) = 88*a(n-1) -128439*a(n-3) +1879848*a(n-4) [phone]*a(n-5) -593002863*a(n-6) [phone]*a(n-8) -98419153113*a(n-9)