login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A187049 Number of 5-step one or two space at a time bishop's tours on an n X n board summed over all starting positions 1
0, 0, 8, 456, 2896, 9216, 20648, 37472, 59524, 86656, 118868, 156160, 198532, 245984, 298516, 356128, 418820, 486592, 559444, 637376, 720388, 808480, 901652, 999904, 1103236, 1211648, 1325140, 1443712, 1567364, 1696096, 1829908, 1968800, 2112772 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 5 of A187046

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..35

FORMULA

Empirical: a(n) = 2540*n^2 - 21128*n + 43936 for n>7

EXAMPLE

Some solutions for 4X4

..0..0..0..0....0..0..0..0....0..0..3..0....4..0..0..0....0..5..0..1

..0..0..1..0....0..4..0..0....0..2..0..4....0..5..0..1....0..0..0..0

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

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

CROSSREFS

Sequence in context: A042525 A028449 A209840 * A221157 A015006 A054326

Adjacent sequences:  A187046 A187047 A187048 * A187050 A187051 A187052

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 6 05:18 EST 2016. Contains 278773 sequences.