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

1,2

Comments

Row 4 of A266101.

Links

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

Example

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

Crossrefs

Cf. A266101.

Sequence in context: A068975 A177709 A211503 * A190538 A190606 A101627

Adjacent sequences: A266101 A266102 A266103 * A266105 A266106 A266107

Keyword

nonn

Author

R. H. Hardin, Dec 21 2015

Status

approved