A203028 Number of nX4 0..3 arrays with row sums equal and column sums unequal to adjacent columns

108, 4904, 191208, 7788648, 315135868, 13106373164, 539443637988, 22639602879704, 946776650128788, 40106804207313724, 1690657696699919704, 71964960511855011228, 3057756409953021991140, 130835056946777504268476

Offset

1,1

Comments

Column 4 of A203031

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

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

Crossrefs

Sequence in context: A269182 A244877 A223153 * A138784 A035812 A054624

Adjacent sequences: A203025 A203026 A203027 * A203029 A203030 A203031

Keyword

nonn

Author

R. H. Hardin Dec 27 2011

Status

approved