The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A194620 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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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
(history; published version)

#4 by Russ Cox at Sat Mar 31 12:36:22 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Aug 30 2011

Discussion

Sat Mar 31

12:36

OEIS Server: https://oeis.org/edit/global/875

#3 by Ron Hardin at Tue Aug 30 18:53:20 EDT 2011

STATUS

editing

approved

#2 by Ron Hardin at Tue Aug 30 18:53:17 EDT 2011

NAME

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

DATA

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

OFFSET

1,1

COMMENTS

Row 6 of A194615

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

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Aug 30 2011

STATUS

approved

editing

#1 by Ron Hardin at Tue Aug 30 18:41:54 EDT 2011

NAME

allocated for Ron Hardin

KEYWORD

allocated

STATUS

approved