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A186967 Number of 4-turn queen's tours on an n X n board summed over all starting positions 0
0, 24, 1344, 10440, 43424, 130592, 320880, 686384, 1326848, 2374152, 3996832 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A186965

LINKS

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

EXAMPLE

Some solutions for 3X3

..0..0..4....4..0..0....0..0..0....0..4..0....3..2..1....0..2..0....0..3..0

..0..0..2....0..3..1....0..2..1....2..1..3....0..0..0....4..0..3....1..4..2

..0..1..3....0..0..2....4..3..0....0..0..0....4..0..0....0..1..0....0..0..0

CROSSREFS

Sequence in context: A074652 A188807 A187029 * A068294 A003170 A160310

Adjacent sequences:  A186964 A186965 A186966 * A186968 A186969 A186970

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 01 2011

STATUS

approved

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Last modified October 2 04:54 EDT 2022. Contains 357191 sequences. (Running on oeis4.)