A237916 Number of (n+1)X(2+1) 0..3 arrays with the upper median plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

1584, 14564, 133528, 1282504, 12149024, 115206520, 1092851528, 10375258140, 98442896216, 934214824740, 8864965437532, 84126729220500, 798309064976816, 7575648390881364, 71889164102413344, 682196900350785372

Offset

1,1

Comments

Column 2 of A237921

Links

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

R. H. Hardin, Empirical recurrence of order 56

Formula

Empirical recurrence of order 56 (see link above)

Example

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

Crossrefs

Sequence in context: A224945 A306313 A053170 * A159211 A235844 A277766

Adjacent sequences: A237913 A237914 A237915 * A237917 A237918 A237919

Keyword

nonn

Author

R. H. Hardin, Feb 15 2014

Status

approved