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A195246 Number of lower triangles of an n X n 0..6 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less 0
7, 103, 4823, 709613, 329060365, 481573562101, 2226347741716207, 32533092875899015419, 1503300467938958707014579, 219724247440207348239797551059, 101603289677502667519178169906161081 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A195248

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

..2..........0..........4..........4..........2..........4..........1

..4.4........2.2........3.5........4.6........1.3........3.2........0.1

..5.6.4......4.4.3......4.5.4......5.6.6......1.3.2......4.3.1......0.2.1

..4.6.6.6....2.2.4.4....3.3.4.4....6.6.6.4....2.2.1.0....2.2.2.3....0.1.0.0

..4.6.5.5.6..4.4.3.4.3..3.2.3.4.2..5.4.5.6.6..0.2.0.1.2..0.1.1.3.1..1.2.2.0.1

CROSSREFS

Sequence in context: A101746 A318398 A318815 * A280644 A322646 A224706

Adjacent sequences:  A195243 A195244 A195245 * A195247 A195248 A195249

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 13 2011

STATUS

approved

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Last modified May 12 10:54 EDT 2021. Contains 343821 sequences. (Running on oeis4.)