A196595 - OEIS

A196595

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

1, 1, 16, 129, 4529, 231416, 26951945, 6221649467, 2919406668996, 2782242914671635, 5383447846721810305, 21145417017943626638884, 168603262296463050704402257, 2729058135478644158855915675547

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OFFSET

1,3

COMMENTS

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

Diagonal of A196601

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=4

..0..0..0..0....0..3..0..0....0..0..0..0....0..0..0..0....0..3..0..0

..3..0..0..3....0..0..0..0....0..0..0..0....0..3..3..0....3..0..0..0

..0..0..0..0....0..0..0..3....3..0..0..3....0..0..0..0....0..0..0..3

..0..3..0..0....0..0..0..0....0..0..0..0....0..0..3..0....0..3..0..0

CROSSREFS

Sequence in context: A099195 A041486 A196642 * A055914 A255816 A335560

Adjacent sequences: A196592 A196593 A196594 * A196596 A196597 A196598

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 04 2011

STATUS

approved