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A194793 Number of lower triangles of an (n+1)X(n+1) 0..7 array with new values introduced in row major order 0..7 and no element equal to any horizontal, diagonal, antidiagonal or vertical neighbor 1
1, 10, 1719, 4018152, 55882468218, 3454550787171726, 921229375293720351150, 1058115897991435552912456494, 5234423089116609084311564185372068, 111525513162694816614399225360134812623972 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A194794

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..12

EXAMPLE

Some solutions for 4X4

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

..1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2

..3.0.3....3.4.3....3.4.0....3.4.5....3.4.5....3.4.5....0.3.0....3.4.3

..4.2.5.2..5.1.5.2..0.5.6.3..1.6.0.4..6.7.3.2..2.0.2.1..1.4.2.3..5.6.7.6

CROSSREFS

Sequence in context: A203696 A203530 A232594 * A211915 A182326 A160303

Adjacent sequences:  A194790 A194791 A194792 * A194794 A194795 A194796

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 03 2011

STATUS

approved

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Last modified August 10 16:24 EDT 2022. Contains 356039 sequences. (Running on oeis4.)