A240257 Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4

16, 102, 707, 5484, 43200, 343959, 2750576, 22038291, 176729972, 1417804827, 11376450010, 91293254853, 732641545797, 5879698617773, 47187185316348, 378700529124397, 3039269539041872, 24391768139474983, 195757199474858916

Offset

1,1

Comments

Column 3 of A240260

Links

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

Example

Some solutions for n=5
..2..2..0....0..2..0....0..2..2....2..2..0....2..0..0....2..2..0....2..2..0
..2..2..2....2..0..0....0..0..0....2..2..0....2..0..2....0..2..2....0..2..0
..2..0..0....2..2..2....2..2..0....0..2..0....0..0..0....2..2..0....0..0..0
..0..2..0....0..0..0....2..2..2....2..2..3....2..0..2....0..2..0....0..2..2
..2..2..0....2..2..0....2..1..3....0..2..2....2..2..2....0..2..2....2..0..2

Crossrefs

Sequence in context: A223016 A253390 A264281 * A199773 A245872 A304505

Adjacent sequences: A240254 A240255 A240256 * A240258 A240259 A240260

Keyword

nonn

Author

R. H. Hardin, Apr 03 2014

Status

approved