A196342 - OEIS

A196342

Number of n X 7 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 1,4,0,2,3 for x=0,1,2,3,4.

13, 275, 3132, 53647, 869434, 13932416, 224664284, 3596759057, 57811730338, 929821862056, 14939206389945, 240046010119898, 3857530827560368, 61988984647826444, 996134711490423957, 16007484096536092797, 257233649380410377869, 4133634615746170283482, 66425751778831953958039

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OFFSET

1,1

COMMENTS

Every 0 is next to 0 1's, every 1 is next to 1 4's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 3's

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for n=4:

..2..0..0..2..0..0..0....0..2..0..2..0..2..0....2..0..0..2..2..0..0

..0..2..2..2..0..0..2....0..2..3..2..0..2..0....0..0..0..0..0..0..0

..2..3..0..0..0..0..2....0..0..2..0..2..3..2....2..3..2..2..2..2..0

..0..2..0..0..0..0..0....2..0..2..0..2..0..0....0..2..0..0..0..2..0

CROSSREFS

Column 7 of A196343.

Sequence in context: A385668 A196652 A197455 * A196321 A197306 A196973

Adjacent sequences: A196339 A196340 A196341 * A196343 A196344 A196345

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 01 2011

STATUS

approved