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A269295
Number of 7Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once.
1
16384, 34012224, 26317946844, 17623065834612, 10908770041709316, 6444304707617709156, 3689070798270477232620, 2064575194564255507198260, 1135872003598654165478951652, 616641759542150716175805966228
OFFSET
1,1
COMMENTS
Row 7 of A269289.
LINKS
EXAMPLE
Some solutions for n=2
..0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0
..0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0
..2..3. .0..1. .1..1. .2..0. .2..3. .2..2. .2..0. .2..2. .2..1. .2..2
..0..2. .0..0. .1..0. .3..1. .3..3. .0..1. .3..1. .0..0. .1..3. .0..0
..2..0. .1..3. .1..2. .0..0. .3..1. .2..0. .1..3. .1..3. .3..2. .1..0
..2..3. .3..3. .0..0. .1..1. .0..0. .2..2. .2..3. .2..2. .0..0. .3..1
..1..1. .1..2. .0..0. .1..3. .1..0. .2..2. .2..2. .2..0. .2..2. .0..1
CROSSREFS
Cf. A269289.
Sequence in context: A224209 A017035 A326252 * A017119 A017215 A017323
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 21 2016
STATUS
approved