A268748 Number of nX6 binary arrays with some element plus some horizontally or vertically adjacent neighbor totalling two no more than once.

41, 659, 10830, 165019, 2425799, 34732937, 487682438, 6746117783, 92215499119, 1248437108837, 16766958502992, 223674635599161, 2966748789292217, 39154974765661223, 514529476985579624, 6735601878829825279

Offset

1,1

Comments

Column 6 of A268750.

Links

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

Formula

Empirical: a(n) = 16*a(n-1) +60*a(n-2) -1148*a(n-3) -3346*a(n-4) +16272*a(n-5) +36588*a(n-6) -104246*a(n-7) -147989*a(n-8) +349140*a(n-9) +217324*a(n-10) -591448*a(n-11) -19320*a(n-12) +431032*a(n-13) -151921*a(n-14) -73194*a(n-15) +41684*a(n-16) +2552*a(n-17) -3594*a(n-18) +148*a(n-19) +100*a(n-20) -4*a(n-21) -a(n-22)

Example

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

Crossrefs

Cf. A268750.

Sequence in context: A078947 A299600 A197371 * A143010 A009730 A009761

Adjacent sequences: A268745 A268746 A268747 * A268749 A268750 A268751

Keyword

nonn

Author

R. H. Hardin, Feb 12 2016

Status

approved