A238931 Number of (2+1)X(n+1) 0..3 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors

36, 864, 13090, 191086, 3025468, 48511734, 773430790, 12302664748, 195681771826, 3112430935472, 49506315426444, 787527376832916, 12528312743968620, 199302213997643582, 3170445669642515236, 50434269374897263770

Offset

1,1

Comments

Row 2 of A238929

Links

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

Example

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

Crossrefs

Sequence in context: A001457 A203271 A004360 * A081142 A061694 A264192

Adjacent sequences: A238928 A238929 A238930 * A238932 A238933 A238934

Keyword

nonn

Author

R. H. Hardin, Mar 07 2014

Status

approved