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A222874 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
11, 1814, 409775, 95867967, 22794825314, 5472896849943, 1322676376672081, 321195816580955511, 78284744747263499257, 19135706630178881122106, 4688528991184907785652449, 1151011442556048521433434944 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A222878

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..97

EXAMPLE

Some solutions for n=3

..0..1..0..2....0..1..0..1....0..0..1..2....0..0..0..1....0..0..1..2

..0..3..1..1....0..1..2..0....1..3..1..0....2..1..1..2....1..3..1..3

..2..0..2..2....1..1..2..2....1..1..3..2....0..3..0..2....3..3..1..2

CROSSREFS

Sequence in context: A287035 A297004 A308155 * A028453 A024151 A114354

Adjacent sequences:  A222871 A222872 A222873 * A222875 A222876 A222877

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 08 2013

STATUS

approved

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Last modified January 21 05:13 EST 2022. Contains 350473 sequences. (Running on oeis4.)