The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A188778 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A188778

Number of 3-turn bishop's tours on an n X n board summed over all starting positions
(history; published version)

#12 by N. J. A. Sloane at Mon Apr 04 16:14:07 EDT 2016

NAME

Number of 3-turn bishop's tours on a an n X n board summed over all starting positions

Discussion

Mon Apr 04

16:14

OEIS Server: https://oeis.org/edit/global/2492

#11 by Charles R Greathouse IV at Fri Dec 18 18:17:37 EST 2015

NAME

Number of 3-turn bishop's tours on a nXn n X n board summed over all starting positions

Discussion

Fri Dec 18

18:17

OEIS Server: https://oeis.org/edit/global/2478

#10 by Joerg Arndt at Sat Sep 01 10:43:09 EDT 2012

STATUS

editing

approved

#9 by Joerg Arndt at Sat Sep 01 10:43:06 EDT 2012

FORMULA

Contribution from Vaclav Kotesovec, Sep 1 01 2012: (Start)

#8 by Joerg Arndt at Sat Sep 01 10:42:47 EDT 2012

FORMULA

Empirical: G.f.: -4*x^3*(7 + 10*x + 5*x^2)/((-1+-x)^5*(1+x))

STATUS

proposed

editing

#7 by Vaclav Kotesovec at Sat Sep 01 10:41:19 EDT 2012

STATUS

editing

proposed

#6 by Vaclav Kotesovec at Sat Sep 01 10:41:08 EDT 2012

FORMULA

Contribution from Vaclav Kotesovec, Sep 1 2012: (Start)

Empirical: G.f.: -4*x^3*(7 + 10*x + 5*x^2)/((-1+x)^5*(1+x))

Empirical: a(n) = 1/4 - 10*n/3 + 23*n^2/3 - 20*n^3/3 + 11*n^4/6 - (-1)^n/4

(End)

STATUS

approved

editing

#5 by Russ Cox at Sat Mar 31 12:36:13 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Apr 10 2011

Discussion

Sat Mar 31

12:36

OEIS Server: https://oeis.org/edit/global/875

#4 by Ron Hardin at Sun Apr 10 07:15:08 EDT 2011

STATUS

proposed

approved

#3 by Ron Hardin at Sun Apr 10 07:15:04 EDT 2011

LINKS

R. H. Hardin, <a href="/A188778/b188778.txt">Table of n, a(n) for n = 1..42</a>