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A223054 Number of 3Xn 0..3 arrays with exactly floor(3Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
0, 32, 1682, 95648, 3760845, 225200914, 8981996365, 555681741893, 22385476818439, 1411431030197268, 57210083819337309, 3652301054192073142, 148668908783460133336, 9574830993089261328274, 390958259282559073567108 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A223052

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A333603 A264074 A264187 * A183242 A186019 A186011

Adjacent sequences:  A223051 A223052 A223053 * A223055 A223056 A223057

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 13 2013

STATUS

approved

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Last modified October 27 10:23 EDT 2021. Contains 348274 sequences. (Running on oeis4.)