Svoboda | Graniru | BBC Russia | Golosameriki | Facebook
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!)

Revision History for A200061

(Underlined text is an addition; strikethrough text is a deletion.)

Showing all changes.
A200061 Number of -n..n arrays x(0..6) of 7 elements with zero sum and elements alternately strictly increasing and strictly decreasing
(history; published version)
#5 by Russ Cox at Sat Mar 31 12:36:37 EDT 2012
AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Nov 13 2011

Discussion
Sat Mar 31 12:36 
OEIS Server: https://oeis.org/edit/global/875
#4 by Ron Hardin at Sun Nov 13 06:38:00 EST 2011
STATUS

editing

approved

#3 by Ron Hardin at Sun Nov 13 06:37:57 EST 2011
LINKS

R. H. Hardin, <a href="/A200061/b200061.txt">Table of n, a(n) for n = 1..200</a>

#2 by Ron Hardin at Sun Nov 13 06:37:38 EST 2011
NAME

allocatedNumber of -n..n arrays x(0..6) of 7 elements with zero sum and elements alternately strictly increasing forand Ronstrictly Hardindecreasing

DATA

14, 472, 4224, 20978, 74338, 211242, 514168, 1115572, 2215290, 4099888, 7165376, 11941380, 19119208, 29580842, 44432366, 65037696, 93057524, 130487666, 179703518, 243503094, 325156994, 428455996, 557766736, 718083722, 915090720

OFFSET

1,1

COMMENTS

Row 7 of A200057

FORMULA

Empirical: a(n) = 2*a(n-1) -a(n-3) -a(n-5) +a(n-6) -2*a(n-7) +2*a(n-8) +a(n-9) -a(n-13) -2*a(n-14) +2*a(n-15) -a(n-16) +a(n-17) +a(n-19) -2*a(n-21) +a(n-22)

EXAMPLE

Some solutions for n=6

..1....4....3...-2....3....6...-3....0...-6...-6...-3....0....4....0...-4....4

.-6....2...-1....0...-6...-6....2....2....6...-4....0...-1....3....4...-6...-6

..6....4....3...-3....2...-2...-4...-4...-4...-5...-6....0....5...-4....6....5

.-6...-6...-1....0...-3...-3....6....6....4....5....5...-3...-6....3....1...-4

..3....0....0...-1....4....6...-5...-5....0....3...-3....5...-4...-6....6....4

..0...-5...-4....6...-6...-3....5....6....1....5....5...-2...-6....4...-4...-5

..2....1....0....0....6....2...-1...-5...-1....2....2....1....4...-1....1....2

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Nov 13 2011

STATUS

approved

editing

#1 by Ron Hardin at Sun Nov 13 06:26:46 EST 2011
NAME

allocated for Ron Hardin

KEYWORD

allocated

STATUS

approved

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 September 2 05:36 EDT 2024. Contains 375604 sequences. (Running on oeis4.)