A194620 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A194620

Half the number of lower triangles of a 7X7 0..n array with no element equal to the average of its horizontal and vertical neighbors

1901849, 202803700252, 1988649454264015, 1946585305112431165, 481414314393133400117, 46519509694797259637061, 2430369828996738172677912

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

OFFSET

1,1

COMMENTS

Row 6 of A194615

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=2

..0..............0..............0..............0..............0

..1.0............1.0............1.0............1.0............1.0

..0.0.1..........0.0.1..........0.0.1..........0.0.1..........0.0.1

..0.0.0.0........0.0.0.0........0.0.0.0........0.0.0.0........0.0.0.0

..1.1.0.2.2......1.1.0.1.2......1.1.0.1.1......1.1.0.1.0......1.1.0.1.2

..0.0.0.2.1.2....0.0.0.0.2.2....0.0.0.2.2.1....0.0.2.0.2.0....0.0.1.0.1.2

..0.1.1.0.0.0.2..1.1.1.0.0.1.0..1.0.2.0.0.1.0..0.1.0.1.0.1.2..1.1.1.2.1.1.2

CROSSREFS

Sequence in context: A204672 A323705 A249318 * A182360 A133542 A215568

Adjacent sequences: A194617 A194618 A194619 * A194621 A194622 A194623

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 30 2011

STATUS

approved