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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
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: A344638 A209681 A209682 * A249964 A281801 A208000
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 11 2012
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)