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A195225 Number of lower triangles of a 7X7 integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by n or less and triangles differing by a constant counted only once 1
2021888119, 764465228592699, 5137554141710397313, 4059527861103273129317, 863969905606597340602967, 76019997788404353762724447, 3546881146489163009435488735, 102667264655001518661047239817 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A195220

a(n) is an Ehrhart polynomial of degree 27. - Robert Israel, Oct 07 2019

LINKS

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

EXAMPLE

Some solutions for n=5

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

...3..5..................5..0.................-3.-3

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

...5..7..4..4............8..4.-1.-2...........-4.-4.-2..1

...6..4..4.-1.-1.........3..3.-1..0.-4........-6.-1.-1.-3..1

...1..4..2.-1..4..2......3..1.-2.-2.-3.-3.....-4.-4.-2.-4.-2..3

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

CROSSREFS

Sequence in context: A259349 A204416 A335839 * A172706 A180618 A292546

Adjacent sequences:  A195222 A195223 A195224 * A195226 A195227 A195228

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 13 2011

STATUS

approved

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Last modified May 12 22:53 EDT 2021. Contains 343829 sequences. (Running on oeis4.)