A197239 Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,2 for x=0,1,2,3,4

1, 18, 156, 1221, 10649, 89527, 750414, 6315333, 53202193, 448046100, 3771630940, 31755317844, 267372295449, 2251142411047, 18953791712561, 159583558349010, 1343626155668202, 11312793102525882, 95249224912654237, 801960149525766205

Offset

1,2

Comments

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

Column 5 of A197242

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A060221 A244876 A171741 * A374979 A060932 A300078

Adjacent sequences: A197236 A197237 A197238 * A197240 A197241 A197242

Keyword

nonn

Author

R. H. Hardin Oct 12 2011

Status

approved