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A195218 Number of lower triangles of an n X n integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by 6 or less and triangles differing by a constant counted only once 0
1, 127, 117585, 845613769, 47764170577925, 21369796486647028143, 76019997788404353762724447, 2155668406192527252815282495516543 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A195220

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A175825 A217914 A203798 * A215692 A212860 A334668

Adjacent sequences:  A195215 A195216 A195217 * A195219 A195220 A195221

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 13 2011

STATUS

approved

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Last modified June 15 15:16 EDT 2021. Contains 345049 sequences. (Running on oeis4.)