A266104 Number of 4Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors exactly one smaller than itself.

1, 39, 230, 929, 6307, 52171, 371130, 2568565, 18322421, 129531126, 926299920, 6712699992, 48087248218, 341400959047, 2440466698929, 17538694281014, 125725413376414, 899035671334963, 6432936252126858, 46077832832481217

Offset: 1

Author

R. H. Hardin, Dec 21 2015

Keywords

• nonn

Comments

Row 4 of A266101.

Examples

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

Links

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

Crossrefs

Cf. A266101.