A206501 - OEIS

A206501

Number of nX4 0..7 arrays with no element equal to another within a city block distance of two, and new values 0..7 introduced in row major order

2, 34, 3130, 502599, 83045488, 13752277898, 2277207309720, 377099217207514, 62445595052884887, 10340702774554689140, 1712370276674504142791, 283560339737534813492944

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OFFSET

1,1

COMMENTS

Column 4 of A206503

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

..4..5..6..3....1..0..6..1....4..0..6..1....4..5..6..7....1..5..6..7

..6..7..1..4....5..4..2..3....1..2..3..7....7..0..3..2....3..4..1..0

CROSSREFS

Sequence in context: A216082 A165938 A255434 * A183414 A002782 A155205

Adjacent sequences: A206498 A206499 A206500 * A206502 A206503 A206504

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 08 2012

STATUS

approved