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A209683 Number of n X n 0..8 arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order 1
1, 15, 1551, 14164693, 847881355388, 5219870359015849505, 70570762532647014868797563, 62256944108221643391817947390337742, 103256072887229091159525820942838733556042886 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A209684

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..43

EXAMPLE

Some solutions for n=3

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

..2..1..1....3..3..1....1..2..0....2..2..1....1..3..3....1..2..2....0..1..1

..2..2..0....3..3..1....1..0..1....2..2..0....2..3..0....3..2..0....0..0..0

CROSSREFS

Sequence in context: A199228 A209681 A209682 * A249964 A281801 A208000

Adjacent sequences:  A209680 A209681 A209682 * A209684 A209685 A209686

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 11 2012

STATUS

approved

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Last modified July 20 16:34 EDT 2019. Contains 325185 sequences. (Running on oeis4.)