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A269207 Number of 7Xn 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once. 1
16384, 8787660, 2380537188, 672230393004, 179867149105740, 47121391706947500, 12093315071771856492, 3057161412747926879388, 763401355846887190121676, 188738443220730807440394588, 46278051540027048274339056012 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 7 of A269201.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
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..2. .1..0. .0..1. .3..1. .0..1. .0..0. .0..0. .2..0. .1..1. .2..2
..0..2. .0..0. .0..0. .3..2. .0..1. .2..0. .0..0. .2..2. .1..3. .2..0
..2..1. .2..2. .2..0. .0..1. .3..1. .2..2. .0..2. .1..0. .1..3. .2..0
..0..2. .1..3. .2..3. .0..2. .3..3. .0..0. .0..0. .0..0. .3..1. .2..3
..3..1. .1..3. .1..3. .3..2. .0..2. .1..1. .0..2. .2..0. .3..2. .2..3
CROSSREFS
Cf. A269201.
Sequence in context: A017692 A010802 A236222 * A016963 A224396 A224029
Adjacent sequences: A269204 A269205 A269206 * A269208 A269209 A269210
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 20 2016
STATUS
approved

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Last modified August 30 15:13 EDT 2024. Contains 375545 sequences. (Running on oeis4.)