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A220318
Equals two maps: number of n X 4 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 n X 4 array.
0
4, 89, 3167, 56819, 984087, 16290350, 264901883
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OFFSET
1,1
COMMENTS
Column 4 of
A220319
.
LINKS
Table of n, a(n) for n=1..7.
EXAMPLE
Some solutions for n=3
..1..0..0..0....0..0..0..1....1..1..0..0....1..0..1..0....1..0..0..1
..1..0..1..0....1..1..0..0....0..0..1..1....0..1..1..0....0..1..0..0
..0..0..1..0....0..0..0..1....1..0..1..0....0..0..1..0....0..1..1..0
CROSSREFS
Cf.
A220319
.
Sequence in context:
A235858
A262409
A183880
*
A220341
A184955
A205295
Adjacent sequences:
A220315
A220316
A220317
*
A220319
A220320
A220321
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Dec 10 2012
STATUS
approved
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Last modified April 24 03:08 EDT 2024. Contains 371918 sequences. (Running on oeis4.)