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A201149 Number of nX2 0..2 arrays with every diagonal, row and column running average nondecreasing rightwards and downwards and diagonally 1
6, 20, 56, 140, 330, 745, 1634, 3504, 7388, 15366, 31612, 64446, 130391, 262113, 523984, 1042433, 2065098, 4075761, 8017395, 15724110, 30756544, 60014931, 116849951, 227054267, 440389499, 852738289, 1648633351, 3182830233 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A201155

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-1) -16*a(n-2) +4*a(n-3) +39*a(n-4) -56*a(n-5) +2*a(n-6) +59*a(n-7) -49*a(n-8) -5*a(n-9) +29*a(n-10) -14*a(n-11) -2*a(n-12) +4*a(n-13) -a(n-14)

EXAMPLE

Some solutions for n=10

..0..1....0..0....0..0....0..0....0..0....0..0....0..1....0..1....0..0....0..0

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

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

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

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

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

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

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

..1..2....1..2....2..2....2..2....1..2....1..2....1..2....2..2....1..1....1..1

..2..2....1..2....2..2....1..2....2..2....2..2....1..2....2..2....1..2....2..2

CROSSREFS

Sequence in context: A323640 A249406 A220020 * A260777 A014480 A048778

Adjacent sequences:  A201146 A201147 A201148 * A201150 A201151 A201152

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 27 2011

STATUS

approved

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Last modified September 29 10:30 EDT 2022. Contains 357088 sequences. (Running on oeis4.)