A233629 Number of (n+1)X(2+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 6

716, 10544, 150054, 2172148, 31361288, 453376730, 6552999568, 94726474064, 1369292267174, 19793668273524, 286125054962336, 4136053427471878, 59788318854891712, 864264410589514964, 12493292614179697626

Offset

1,1

Comments

Column 2 of A233635

Links

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

Formula

Empirical: a(n) = 14*a(n-1) +61*a(n-2) -774*a(n-3) -1112*a(n-4) +13542*a(n-5) +5120*a(n-6) -98447*a(n-7) +17493*a(n-8) +306879*a(n-9) -134073*a(n-10) -393421*a(n-11) +189749*a(n-12) +211175*a(n-13) -85489*a(n-14) -45046*a(n-15) +12738*a(n-16) +2726*a(n-17) -335*a(n-18) -21*a(n-19)

Example

Some solutions for n=3
..2..3..1....2..3..3....1..3..1....0..3..1....0..2..0....2..3..2....1..0..1
..2..0..0....1..0..1....0..0..0....0..0..1....2..3..3....2..0..0....2..3..2
..3..1..3....0..2..3....0..3..2....3..3..3....1..0..3....3..3..3....1..0..0
..0..0..2....1..3..1....0..3..0....0..0..0....3..3..3....1..0..3....2..3..3

Crossrefs

Sequence in context: A208414 A214237 A252467 * A151631 A183841 A332171

Adjacent sequences: A233626 A233627 A233628 * A233630 A233631 A233632

Keyword

nonn

Author

R. H. Hardin, Dec 14 2013

Status

approved