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A195283 Number of lower triangles of a 7X7 integer array with each element differing from all of its vertical and horizontal neighbors by n or less and triangles differing by a constant counted only once 1
48439766655, 30812488814662125, 241338657495589799523, 203368493873412168605037, 44727914263743356875711779, 4011033701337366560359871745, 189393562987102056163761489375 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A195278

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..8

EXAMPLE

Some solutions for n=5

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

..-2.-6.................-1..2.................-5-10

...1.-4.-2..............-6.-3.-6..............-2.-5.-1

...1.-2..2..7...........-2.-4.-3.-1...........-7.-6.-5..0

..-2.-7.-2..3.-2.........3..0..1..3..0........-9.-8.-8.-5.-9

..-6-10.-6.-1.-5.-4......8..3..0.-1.-5-10.....-8.-6.-5.-9-12-17

..-6.-8.-3..1..0.-4.-3...4..2..4..2.-3.-5.-2.-13-11.-7.-5.-7-12-13

CROSSREFS

Sequence in context: A003940 A003933 A092381 * A179228 A084482 A216019

Adjacent sequences:  A195280 A195281 A195282 * A195284 A195285 A195286

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 14 2011

STATUS

approved

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Last modified June 20 02:04 EDT 2013. Contains 226416 sequences.