A206396 - OEIS

A206396

T(n,k)=Number of nXk 0..5 arrays with no element equal to another within a city block distance of two, and new values 0..5 introduced in row major order

1, 1, 1, 1, 1, 1, 2, 4, 4, 2, 5, 25, 26, 25, 5, 15, 172, 206, 206, 172, 15, 51, 1201, 1592, 1931, 1592, 1201, 51, 187, 8404, 12428, 16784, 16784, 12428, 8404, 187, 715, 58825, 96632, 151630, 170796, 151630, 96632, 58825, 715, 2795, 411772, 752552, 1343560

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,7

COMMENTS

Table starts

...1.....1......1........2.........5.........15..........51..........187

...1.....1......4.......25.......172.......1201........8404........58825

...1.....4.....26......206......1592......12428.......96632.......752552

...2....25....206.....1931.....16784.....151630.....1343560.....12046648

...5...172...1592....16784....170796....1787258....18574298....193499878

..15..1201..12428...151630...1787258...21983256...268956972...3301485294

..51..8404..96632..1343560..18574298..268956972..3889732730..56960076094

.187.58825.752552.12046648.193499878.3301485294.56960076094.998388746378

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..127

EXAMPLE

Some solutions for n=4 k=3

..0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2

..2..3..0....2..3..4....2..3..4....3..4..5....3..4..5....2..3..0....2..3..4

..1..4..5....1..0..5....4..5..1....5..0..1....1..0..3....4..5..1....1..5..0

..0..2..1....3..2..1....1..2..0....4..3..2....2..5..1....0..2..3....0..2..3

CROSSREFS

Column 1 is A007581(n-3)

Column 2 is A034494(n-2)

Sequence in context: A234247 A160163 A263442 * A206389 A206503 A323938

Adjacent sequences: A206393 A206394 A206395 * A206397 A206398 A206399

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 07 2012

STATUS

approved