A239860 Number of 3Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of the 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

4, 5, 44, 78, 255, 742, 1382, 5647, 14755, 33946, 120389, 305123, 717503, 2451925, 6276842, 15461619, 51283453, 130329061, 331984698, 1067700153, 2718467454, 7099921104, 22241389875, 56803646347, 151320850227, 463374925294

Offset

1,1

Comments

Row 3 of A239858

Links

R. H. Hardin, Table of n, a(n) for n = 1..174

Example

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

Crossrefs

Sequence in context: A256290 A041037 A041038 * A151486 A042383 A135799

Adjacent sequences: A239857 A239858 A239859 * A239861 A239862 A239863

Keyword

nonn

Author

R. H. Hardin, Mar 28 2014

Status

approved