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A266021 Number of nX4 integer arrays with each element equal to the number of horizontal, vertical and antidiagonal neighbors exactly one smaller than itself. 1
5, 42, 91, 577, 3796, 19688, 110924, 656555, 3732300, 21344656, 123330565, 708246405, 4066193034, 23408646708, 134627655119, 773992993358, 4452175085918, 25607065587568, 147270467464058, 847048745101385 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A266025.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A266025.

Sequence in context: A025173 A222474 A327269 * A062021 A241780 A215785

Adjacent sequences:  A266018 A266019 A266020 * A266022 A266023 A266024

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2015

STATUS

approved

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Last modified August 4 18:27 EDT 2020. Contains 336202 sequences. (Running on oeis4.)