A223383 Number of nX4 0..2 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..2 introduced in row major order

14, 366, 10830, 329840, 10139432, 312609528, 9647052880, 297793167360, 9193379042784, 283823521300032, 8762451963477680, 270523002967477744, 8351859046525834416, 257847094310498822096, 7960518722851712423984

Offset

1,1

Comments

Column 4 of A223387

Links

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

Formula

Empirical: a(n) = 53*a(n-1) -844*a(n-2) +5346*a(n-3) -11368*a(n-4) -12894*a(n-5) +72036*a(n-6) -49920*a(n-7) -45648*a(n-8) +38880*a(n-9) for n>10

Example

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

Crossrefs

Sequence in context: A239784 A113673 A184268 * A215300 A159535 A171718

Adjacent sequences: A223380 A223381 A223382 * A223384 A223385 A223386

Keyword

nonn

Author

R. H. Hardin Mar 19 2013

Status

approved