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Revision History for A201999

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A201999

Number of -1..1 circular arrays x(0..n+1) of n+2 elements with zero sums of x(i) and x(i)*x((i+1) mod (n+2))
(history; published version)

#6 by Russ Cox at Sat Mar 31 12:36:46 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Dec 07 2011

Discussion

Sat Mar 31

12:36

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

#5 by Ron Hardin at Wed Dec 07 21:42:48 EST 2011

STATUS

editing

approved

#4 by Ron Hardin at Wed Dec 07 21:42:45 EST 2011

LINKS

R. H. Hardin, <a href="/A201999/b201999.txt">Table of n, a(n) for n = 1..200</a>

#3 by Ron Hardin at Wed Dec 07 21:42:10 EST 2011

NAME

allocated for Ron HardinNumber of -1..1 circular arrays x(0..n+1) of n+2 elements with zero sums of x(i) and x(i)*x((i+1) mod (n+2))

DATA

1, 9, 11, 43, 85, 329, 577, 1921, 4115, 14331, 32631, 106527, 262481, 833225, 2118711, 6523351, 17225857, 52322449, 141538657, 424472841, 1171251495, 3484084667, 9746606361, 28817241129, 81509487175, 240107776015, 684814280371

OFFSET

1,2

COMMENTS

Column 1 of A202006

EXAMPLE

Some solutions for n=10

.-1....1....0...-1....0....0....1....0....1...-1....0....1....0....0...-1....0

..0...-1....1....0...-1...-1....0....1....1...-1...-1....0....1....1....0....1

..0...-1....1....1...-1....0....0...-1...-1....1....0....0...-1....0...-1....1

..1....0...-1...-1....0....0...-1....1...-1...-1....0...-1...-1....0...-1...-1

..0....0...-1....0....0....0....1....1....0....1....0...-1...-1...-1....0...-1

..0....0....0....1....0....1...-1....0....1....1....1....1....1...-1....1....0

.-1....0....0....1...-1....1...-1...-1...-1...-1....1....1...-1....0....0....1

.-1....0....0....0....1....0....0...-1...-1...-1...-1...-1....0....1...-1....0

..0....1....0....0....1...-1....0....1....1....0....0....0...-1....0....1...-1

..1....0...-1...-1...-1....1....0....1....0....1....0....0....1....0....0....0

..0....0....1....0....1....0....0...-1....0....1....0...-1....1....1....1...-1

..1....0....0....0....1...-1....1...-1....0....0....0....1....1...-1....1....1

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Dec 07 2011

STATUS

approved

editing

#2 by Ron Hardin at Wed Dec 07 21:39:59 EST 2011

KEYWORD

allocating

allocated

#1 by Ron Hardin at Wed Dec 07 21:39:59 EST 2011

NAME

allocated for Ron Hardin

KEYWORD

allocating

STATUS

approved