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A194610 Half the number of lower triangles of an (n+1)X(n+1) 0..3 array with no element equal to the average of its horizontal and vertical neighbors 0
16, 775, 132214, 86867366, 214726600125, 1988649454264015, 69098146174647014753, 9010212831798851496619501, 4408846076603948466494884939778 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A194615

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for 3X3

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

..2.1....0.1....2.1....1.0....2.3....2.0....0.0....2.1....0.3....2.0....0.3

..2.1.2..1.3.2..3.1.3..2.1.0..0.0.2..2.0.3..2.1.3..1.1.2..3.0.2..2.3.0..2.3.1

CROSSREFS

Sequence in context: A042109 A221061 A326216 * A215171 A224736 A232519

Adjacent sequences:  A194607 A194608 A194609 * A194611 A194612 A194613

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 30 2011

STATUS

approved

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Last modified January 20 13:55 EST 2022. Contains 350472 sequences. (Running on oeis4.)