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A186965 T(n,k)=Number of n-turn queen's tours on a kXk board summed over all starting positions 4
1, 4, 0, 9, 12, 0, 16, 56, 24, 0, 25, 152, 296, 24, 0, 36, 320, 1304, 1344, 0, 0, 49, 580, 3808, 10440, 5120, 0, 0, 64, 952, 8832, 43424, 77384, 15760, 0, 0, 81, 1456, 17672, 130592, 473632, 527528, 36816, 0, 0, 100, 2112, 31888, 320880, 1875432, 4927216 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

.1..4.....9.......16.......25.......36......49.......64......81...100..121.144

.0.12....56......152......320......580.....952.....1456....2112..2940.3960

.0.24...296.....1304.....3808.....8832...17672....31888...53312.84040

.0.24..1344....10440....43424...130592..320880...686384.1326848

.0..0..5120....77384...473632..1875432.5706000.14543984

.0..0.15760...527528..4927216.26115816

.0..0.36816..3280384.48781648

.0..0.57904.18430848

.0..0.45856

.0..0

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..71

EXAMPLE

Some n=3 solutions for 3X3

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

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

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

CROSSREFS

Row 2 is A035005

Sequence in context: A186861 A187027 A187850 * A330386 A098487 A174381

Adjacent sequences:  A186962 A186963 A186964 * A186966 A186967 A186968

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 01 2011

STATUS

approved

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Last modified September 28 20:34 EDT 2022. Contains 357081 sequences. (Running on oeis4.)