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A223122 Number of nX4 0..2 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..2 order 1
10, 489, 28907, 1780641, 112106293, 7157970340, 461597847603, 29989116614529, 1959625907209239, 128645318481467647, 8477443608456769792, 560422268684443059564, 37148157807866359018565, 2468123723995159036467948 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A223126

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A173157 A035320 A200458 * A071096 A039835 A293090

Adjacent sequences:  A223119 A223120 A223121 * A223123 A223124 A223125

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 15 2013

STATUS

approved

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Last modified October 18 07:42 EDT 2019. Contains 328146 sequences. (Running on oeis4.)