login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A187031 Number of 6-step one or two collinear space at a time queen's tours on an n X n board summed over all starting positions 0
0, 0, 15760, 263000, 1251720, 3443028, 7080688, 12213336, 18821144, 26872340, 36353568 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 6 of A187027

LINKS

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

EXAMPLE

Some solutions for 4X4

..6..5..0..0....0..6..5..0....0..4..2..0....0..2..0..1....6..4..3..0

..0..0..4..0....0..4..3..0....0..3..5..6....0..0..3..4....5..2..0..0

..0..0..3..1....0..2..0..0....0..0..1..0....6..0..5..0....1..0..0..0

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

CROSSREFS

Sequence in context: A205897 A190834 A183966 * A233642 A246042 A235755

Adjacent sequences:  A187028 A187029 A187030 * A187032 A187033 A187034

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 02 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 22 02:48 EDT 2021. Contains 347605 sequences. (Running on oeis4.)