login
A269206
Number of 6Xn 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.
1
4096, 1090740, 142233732, 19558138380, 2532677348772, 320994710282892, 39825831571425924, 4865841496644992100, 587133256785089633172, 70137053123425124078748, 8308848756491598850682388
OFFSET
1,1
COMMENTS
Row 6 of A269201.
LINKS
EXAMPLE
Some solutions for n=2
..0..1. .0..0. .0..1. .0..0. .0..0. .0..1. .0..1. .0..0. .0..1. .0..0
..0..1. .0..0. .0..2. .2..0. .0..2. .0..0. .0..1. .0..1. .0..0. .0..0
..1..0. .0..1. .3..1. .0..0. .3..2. .2..0. .3..1. .3..1. .2..0. .2..0
..2..0. .0..2. .1..2. .1..0. .2..0. .0..0. .3..2. .3..3. .3..2. .2..3
..1..3. .0..2. .2..3. .2..1. .2..3. .2..1. .2..0. .3..3. .2..2. .3..2
..0..0. .2..3. .2..3. .3..2. .3..2. .1..0. .0..0. .2..3. .0..2. .0..3
CROSSREFS
Cf. A269201.
Sequence in context: A016962 A224395 A224028 * A183816 A224285 A224208
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 20 2016
STATUS
approved