A238771 Number of nX4 0..3 arrays with no element equal to the sum modulo 4 of elements to its left or elements above it

32, 810, 22242, 604412, 16041854, 432845880, 11591229010, 311132395064, 8346793174230, 223952032043062, 6008329642035378, 161205690589879938, 4325039168486267828, 116040031314154634676, 3113310166409157643842

Offset

1,1

Comments

Column 4 of A238775

Links

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

Example

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

Crossrefs

Sequence in context: A183215 A282396 A297099 * A181248 A139677 A231161

Adjacent sequences: A238768 A238769 A238770 * A238772 A238773 A238774

Keyword

nonn

Author

R. H. Hardin, Mar 05 2014

Status

approved