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A220928

Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 nX4 array.

20, 114, 1448, 15360, 149336, 1346477, 11432523, 90627413, 672437960, 4724581523, 31737220657, 204660108794, 1268432419949, 7564543799888, 43494599738604, 241678326267770, 1300626138728509, 6792490340804235, 34484471821861910

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A220931

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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