A240156 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4

7, 25, 67, 676, 1328, 5701, 24419, 52676, 243555, 876504, 2400051, 10681824, 37465330, 108284648, 460964686, 1527396439, 4792821890, 19591078862, 63187977557, 212419410767, 830175708307, 2671224202187, 9338356637595

Offset

1,1

Comments

Row 4 of A240153

Links

R. H. Hardin, Table of n, a(n) for n = 1..155

Example

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

Crossrefs

Sequence in context: A001296 A000970 A247620 * A155245 A155291 A155221

Adjacent sequences: A240153 A240154 A240155 * A240157 A240158 A240159

Keyword

nonn

Author

R. H. Hardin, Apr 02 2014

Status

approved