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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 R. H. Hardin, Table of n, a(n) for n = 1..210 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: A216608 A238819 A110899 * A220940 A012600 A157479 Adjacent sequences: A281123 A281124 A281125 * A281127 A281128 A281129 KEYWORD nonn AUTHOR R. H. Hardin, Jan 15 2017 STATUS approved

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Last modified March 23 23:09 EDT 2023. Contains 361454 sequences. (Running on oeis4.)