A238932 Number of (3+1)X(n+1) 0..3 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors

144, 13456, 611524, 25080064, 1176627204, 56843142724, 2709454265764, 128279816340624, 6079146560329924, 288422073077743396, 13684604007820147600, 649179381582973359556, 30795222312008784568324

Offset

1,1

Comments

Row 3 of A238929

Links

R. H. Hardin, Table of n, a(n) for n = 1..143

Example

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

Crossrefs

Sequence in context: A199406 A182913 A231697 * A230969 A252779 A238284

Adjacent sequences: A238929 A238930 A238931 * A238933 A238934 A238935

Keyword

nonn

Author

R. H. Hardin, Mar 07 2014

Status

approved