A197243 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,0,1,1,1 for x=0,1,2,3,4

1, 4, 3, 275, 5062, 405065, 48703999, 11304892092, 9455531359836, 13086658688226332

Offset

1,2

Comments

Every 0 is next to 0 0's, every 1 is next to 1 0'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

Diagonal of A197250

Links

Table of n, a(n) for n=1..10.

Example

All solutions containing all values 0 to 4 for n=4
..0..1..3..1....1..0..1..2....1..3..1..0....2..1..0..1
..1..4..1..0....3..1..4..1....0..1..4..1....1..4..1..3
..3..1..4..1....1..4..1..0....1..4..1..3....0..1..4..1
..1..0..1..2....0..1..3..1....2..1..0..1....1..3..1..0

Crossrefs

Sequence in context: A335913 A340667 A344407 * A175372 A069191 A175362

Adjacent sequences: A197240 A197241 A197242 * A197244 A197245 A197246

Keyword

nonn

Author

R. H. Hardin Oct 12 2011

Status

approved