A239173 Number of (n+1)X(3+1) 0..2 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors

98, 514, 9604, 130890, 1876940, 26726740, 381984614, 5442841504, 77654661978, 1107987680604, 15802237635146, 225425167338190, 3215775310811444, 45870835552152286, 654345984389717822, 9334191267457643510

Offset

1,1

Comments

Column 3 of A239178

Links

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

R. H. Hardin, Empirical recurrence of order 67

Formula

Empirical recurrence of order 67 (see link above)

Example

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

Crossrefs

Sequence in context: A071319 A263040 A263033 * A233928 A233921 A203083

Adjacent sequences: A239170 A239171 A239172 * A239174 A239175 A239176

Keyword

nonn

Author

R. H. Hardin, Mar 11 2014

Status

approved