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A194617 Half the number of lower triangles of a 4X4 0..n array with no element equal to the average of its horizontal and vertical neighbors 1
47, 4322, 132214, 1674043, 12561823, 66369488, 279618492, 975189851, 2972844263, 8086809479, 20111108169, 46277171169, 100029289052, 204344500677, 398372414831, 744412292078, 1341415693780, 2338177034539, 3960008651919 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A194615

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..50

EXAMPLE

Some solutions for n=2

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

..0.1......0.2......2.2......2.0......2.2......2.2......0.2......2.0

..0.1.0....1.2.0....0.0.2....1.2.1....1.1.0....0.0.1....1.1.0....0.1.1

..0.2.2.0..2.0.0.1..1.0.0.2..0.0.2.1..1.2.0.2..1.0.0.1..1.0.0.1..2.0.2.1

CROSSREFS

Sequence in context: A123798 A104069 A334180 * A217229 A217230 A217231

Adjacent sequences:  A194614 A194615 A194616 * A194618 A194619 A194620

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 30 2011

STATUS

approved

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Last modified May 25 22:51 EDT 2022. Contains 354073 sequences. (Running on oeis4.)