A203262 T(n,k)=Number of nXk 0..7 arrays with every nonzero element less than or equal to some NW, E or S neighbor

1, 1, 1, 1, 64, 1, 1, 2598, 2598, 1, 1, 62098, 716430, 62098, 1, 1, 1224456, 107936298, 107936298, 1224456, 1, 1, 24301646, 13994382224, 93604950539, 13994382224, 24301646, 1, 1, 508333573, 1956615126953, 71719101346406, 71719101346406

Offset

1,5

Comments

Table starts

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

.1..........64..............2598...................62098

.1........2598............716430...............107936298

.1.......62098.........107936298.............93604950539

.1.....1224456.......13994382224..........71719101346406

.1....24301646.....1956615126953.......60474221730991631

.1...508333573...288459211010972....52958564655658086303

.1.10796311201.42000627679688066.45410792047891744041176

Links

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

Example

Some solutions for n=4 k=3
..4..3..1....6..0..2....6..1..1....4..1..2....2..5..5....6..2..2....4..6..7
..5..5..5....6..3..2....6..5..1....4..5..5....4..0..5....6..0..2....1..1..7
..0..4..5....6..1..3....6..2..5....2..1..5....5..5..0....6..6..0....5..7..7
..3..3..4....6..6..0....6..6..0....2..2..0....0..5..3....1..1..5....3..5..7

Crossrefs

Sequence in context: A247067 A221761 A085339 * A174927 A303329 A301911

Adjacent sequences: A203259 A203260 A203261 * A203263 A203264 A203265

Keyword

nonn,tabl

Author

R. H. Hardin Dec 30 2011

Status

approved