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!)
A212270 Number of ways to place k non-attacking wazirs on an n x n cylindrical chessboard, summed over all k >= 0. 5
2, 7, 43, 933, 36211, 3557711, 746156517, 363549830913, 394677987525997, 974602314570939359, 5418730454986467701985, 68176187476467835406646029, 1936241516342334422813929891295, 124281423643836238320564876791634465, 18018270577720149773239661332878801006033 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Wazir is a leaper [0,1].

LINKS

Vaclav Kotesovec, Table of n, a(n) for n = 1..31

V. Kotesovec, Non-attacking chess pieces, 6ed, 2013, p.414

FORMULA

Limit n ->infinity (a(n))^(1/n^2) is the hard square entropy constant A085850.

CROSSREFS

Main diagonal of A286513.

Cf. A006506, A027683(n-1), A182407, A212269, A212271.

Sequence in context: A340335 A011835 A198946 * A270348 A270580 A103084

Adjacent sequences:  A212267 A212268 A212269 * A212271 A212272 A212273

KEYWORD

nonn,hard

AUTHOR

Vaclav Kotesovec, May 12 2012

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 March 8 10:20 EST 2021. Contains 341948 sequences. (Running on oeis4.)