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A266029 Number of nX4 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than itself. 1
11, 315, 5594, 118489, 2482216, 52086421, 1092258910, 22909266015, 480473869537, 10077157027608, 211350503493933, 4432712286529026, 92968428515505883, 1949851492689803393, 40894749305093748839, 857696374917901826350 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A266033.

LINKS

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

FORMULA

Empirical: a(n) = 11*a(n-1) +231*a(n-2) -100*a(n-3) -7612*a(n-4) -1116*a(n-5) +74582*a(n-6) -64354*a(n-7) -370540*a(n-8) +661109*a(n-9) +1260417*a(n-10) +252581*a(n-11) -15283*a(n-12) +86793*a(n-13) -32631*a(n-14) +2989*a(n-15) -36*a(n-16) for n>17

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A266033.

Sequence in context: A267753 A233241 A266830 * A106827 A276977 A176285

Adjacent sequences:  A266026 A266027 A266028 * A266030 A266031 A266032

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2015

STATUS

approved

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Last modified August 10 19:52 EDT 2020. Contains 336381 sequences. (Running on oeis4.)