A197612 - OEIS

A197612

Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,1,1,1 for x=0,1,2,3,4.

9, 1025, 47610, 2851047, 153043371, 8272253014, 449467029436, 24420773475851, 1328293306974369, 72207065980385107, 3923202041814469462, 213227050029059951502, 11589220719390200985775, 629888220802706121113572

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OFFSET

1,1

COMMENTS

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

Column 7 of A197613

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..35

EXAMPLE

Some solutions containing all values 0 to 4 for n=4

..1..2..0..1..0..1..0....0..1..2..0..0..2..1....1..2..2..1..3..1..1

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

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

..2..1..3..1..0..1..2....0..0..1..2..1..1..2....2..1..0..1..0..0..0

CROSSREFS

Sequence in context: A266321 A228293 A197781 * A004809 A099127 A172944

Adjacent sequences: A197609 A197610 A197611 * A197613 A197614 A197615

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 16 2011

STATUS

approved