The On-Line Encyclopedia of Integer Sequences (OEIS)

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A200424

Number of -2..2 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero
(history; published version)

#6 by Russ Cox at Sat Mar 31 12:36:39 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Nov 17 2011

Discussion

Sat Mar 31

12:36

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

#5 by Ron Hardin at Thu Nov 17 16:18:18 EST 2011

STATUS

editing

approved

#4 by Ron Hardin at Thu Nov 17 16:18:15 EST 2011

LINKS

R. H. Hardin, <a href="/A200424/b200424.txt">Table of n, a(n) for n = 1..200</a>

#3 by Ron Hardin at Thu Nov 17 16:17:54 EST 2011

NAME

allocated for Ron HardinNumber of -2..2 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero

DATA

20, 80, 212, 594, 1928, 6780, 23674, 80750, 271000, 909282, 3082640, 10545846, 36174576, 123964062, 424595930, 1456168762, 5004245744, 17226485764, 59361633214, 204702938074, 706403203606, 2439664629760, 8432567247356

OFFSET

1,1

COMMENTS

Column 2 of A200430

EXAMPLE

Some solutions for n=3

.-2....2...-1...-1....2...-2....0...-1....2....2....2...-1....1...-1....1....0

.-2...-1....0...-2....1...-2...-1...-2...-1....1....1....0....2....0....0...-1

..0...-2....2....0...-2....1....2...-2....2....0....0...-2....1...-2...-2....0

..1...-2....0....1....0....2....1....1....0...-2...-2...-1...-2....0...-2...-2

..2....1....1....1...-1....0....0....2...-1...-2....0....2...-1....1....1....1

..1....2...-2....1....0....1...-2....2...-2....1...-1....2...-1....2....2....2

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Nov 17 2011

STATUS

approved

editing

#2 by Ron Hardin at Thu Nov 17 16:16:34 EST 2011

KEYWORD

allocating

allocated

#1 by Ron Hardin at Thu Nov 17 16:16:34 EST 2011

NAME

allocated for Ron Hardin

KEYWORD

allocating

STATUS

approved