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A266051 Number of nX4 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself. 1
7, 58, 302, 4203, 41919, 406412, 3922630, 37847050, 366073677, 3539729256, 34225117612, 330920692737, 3199615235589, 30936683427950, 299122948811816, 2892181883282837, 27964142570392887, 270381764365092475 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A266055.

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-1) +19*a(n-2) +54*a(n-3) +52*a(n-4) +580*a(n-5) +223*a(n-6) -275*a(n-7) -60*a(n-8) +44*a(n-9) -4*a(n-10) for n>12

EXAMPLE

Some solutions for n=4

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

..2..1..4..0....1..0..3..0....0..3..4..0....1..4..0..1....2..1..4..0

..0..4..4..0....1..4..4..0....0..3..1..2....0..4..3..0....1..4..1..2

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

CROSSREFS

Cf. A266055.

Sequence in context: A324420 A225160 A219974 * A202975 A051816 A015566

Adjacent sequences:  A266048 A266049 A266050 * A266052 A266053 A266054

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2015

STATUS

approved

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Last modified July 4 16:52 EDT 2022. Contains 355081 sequences. (Running on oeis4.)