login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A187030 Number of 5-step one or two collinear space at a time queen's tours on an n X n board summed over all starting positions 0

%I

%S 0,0,5120,45152,161256,376248,696992,1121176,1647008,2273384,3000304,

%T 3827768,4755776,5784328,6913424,8143064,9473248,10903976,12435248

%N Number of 5-step one or two collinear space at a time queen's tours on an n X n board summed over all starting positions

%C Row 5 of A187027

%F Empirical: a(n) = 50272*n^2 - 328792*n + 534104 for n>7

%e Some solutions for 4X4

%e ..0..0..0..0....0..5..0..0....0..0..4..0....0..0..0..0....0..0..0..0

%e ..0..5..0..0....0..0..0..1....0..3..0..5....1..2..0..3....0..3..5..4

%e ..0..1..2..0....0..4..3..0....0..2..0..0....5..0..0..0....0..0..2..0

%e ..0..4..3..0....0..2..0..0....1..0..0..0....0..4..0..0....0..0..0..1

%K nonn

%O 1,3

%A _R. H. Hardin_ Mar 02 2011

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 12 20:01 EDT 2022. Contains 356077 sequences. (Running on oeis4.)