A203506 T(n,k)=Number of nXk 0..6 arrays with every nonzero element less than or equal to some NW, E or S neighbor

1, 1, 1, 1, 49, 1, 1, 1554, 1554, 1, 1, 29701, 296814, 29701, 1, 1, 481122, 31795165, 31795165, 481122, 1, 1, 7959529, 3024812086, 17549687172, 3024812086, 7959529, 1, 1, 138035591, 312327861320, 8828365834694, 8828365834694, 312327861320

Offset

1,5

Comments

Table starts

.1.........1..............1...................1........................1

.1........49...........1554...............29701...................481122

.1......1554.........296814............31795165...............3024812086

.1.....29701.......31795165.........17549687172............8828365834694

.1....481122.....3024812086.......8828365834694........22732800433168401

.1...7959529...312327861320....4878810545594780.....63659189467084692929

.1.138035591.33576251318216.2766231303166191786.184087747131825069346215

Links

R. H. Hardin, Table of n, a(n) for n = 1..84

Example

Some solutions for n=5 k=3
..4..6..0....2..5..1....0..0..4....2..0..1....5..5..1....1..3..1....1..1..3
..5..6..6....0..5..6....2..4..4....2..3..1....0..5..1....1..5..1....6..6..3
..1..5..1....2..4..6....0..4..4....6..4..4....2..2..3....3..5..3....1..6..4
..5..1..0....6..6..6....5..1..1....6..2..4....6..4..0....4..5..3....4..2..1
..5..5..1....5..5..6....5..5..0....6..6..0....6..6..3....1..5..5....4..4..0

Crossrefs

Sequence in context: A214953 A005071 A174696 * A254617 A012120 A278107

Adjacent sequences: A203503 A203504 A203505 * A203507 A203508 A203509

Keyword

nonn,tabl

Author

R. H. Hardin Jan 02 2012

Status

approved