A232903 Number of (n+1)X(3+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally

52, 320, 4928, 62276, 761860, 9880580, 123587140, 1571314692, 19864803028, 251467184100, 3183335705332, 40288593520196, 509981865744852, 6454933266401252, 81703778819302772, 1034162820208546180

Offset

1,1

Comments

Column 3 of A232908

Links

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

Formula

Empirical: a(n) = 6*a(n-1) +79*a(n-2) +128*a(n-3) -788*a(n-4) +196*a(n-5) -644*a(n-6) +416*a(n-7) -64*a(n-8)

Example

Some solutions for n=4
..0..1..2..0....2..1..2..0....0..1..2..0....0..1..2..2....2..1..0..2
..2..2..1..0....0..1..1..2....0..1..1..2....0..1..1..0....0..0..1..2
..1..0..0..1....0..1..0..1....0..1..0..0....2..1..0..0....2..1..2..1
..2..1..2..0....2..1..2..2....2..1..1..0....2..1..1..2....0..1..0..2
..0..2..1..0....2..0..1..0....2..2..1..2....2..0..1..2....2..1..1..0

Crossrefs

Sequence in context: A079414 A270769 A281396 * A262757 A262477 A264494

Adjacent sequences: A232900 A232901 A232902 * A232904 A232905 A232906

Keyword

nonn

Author

R. H. Hardin, Dec 02 2013

Status

approved