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A223784 Number of nX3 0..2 arrays with rows, diagonals and antidiagonals unimodal 1
22, 484, 8635, 151580, 2703137, 48302789, 862007289, 15379566078, 274427327200, 4896915028511, 87380287912506, 1559204462831053, 27822300189794631, 496458709513621497, 8858765510668046944, 158075026701646689756 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A223789

LINKS

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

FORMULA

Empirical: a(n) = 18*a(n-1) -24*a(n-2) +364*a(n-3) +605*a(n-4) -5879*a(n-5) -3267*a(n-6) -28514*a(n-7) -68422*a(n-8) +215872*a(n-9) +381625*a(n-10) +110428*a(n-11) +62650*a(n-12) -42873*a(n-13) -108576*a(n-14) -28080*a(n-15)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A223826 A223618 A223678 * A223970 A171296 A009966

Adjacent sequences:  A223781 A223782 A223783 * A223785 A223786 A223787

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2013

STATUS

approved

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Last modified May 19 05:04 EDT 2022. Contains 353826 sequences. (Running on oeis4.)