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A281126 Number of nX4 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. 1
2, 208, 5590, 75668, 923678, 10441416, 112649322, 1178277478, 12052427112, 121217893114, 1203135774464, 11815341234706, 115023383706648, 1111618427587466, 10676654271394364, 102000704609797814 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A281129.
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..1. .0..1..1..2. .0..0..1..1. .0..1..2..1. .0..0..1..1
..1..1..2..2. .2..0..2..1. .1..2..0..2. .2..1..2..2. .1..2..0..0
..0..0..1..0. .0..1..2..0. .1..0..1..2. .0..2..0..0. .2..1..2..1
..2..2..1..0. .2..0..1..1. .0..2..0..1. .0..1..2..2. .2..0..1..0
CROSSREFS
Cf. A281129.
Sequence in context: A238819 A110899 A363461 * A220940 A012600 A157479
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2017
STATUS
approved

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Last modified March 19 01:22 EDT 2024. Contains 370952 sequences. (Running on oeis4.)