VOOZH
about
URL: https://oeis.org/A202961
⇱ A202961 - OEIS
login
A202961
Number of arrays of n+2 integers in -7..7 with sum zero and adjacent elements differing in absolute value.
1
128, 1576, 17296, 207184, 2537024, 31155004, 384996502, 4786979780, 59791891464, 749603860520, 9427927830076, 118904758131236, 1503198371854568, 19043136745799960, 241690849746856584, 3072505406058890180
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,1
COMMENTS
Column 7 of
A202962
LINKS
R. H. Hardin,
Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=3
..4...-3....6...-6...-4...-7...-1....1...-3....0....1...-7....0....0....5....1
..2....7....0....0...-6....1...-3....0...-4....7...-7...-1....2...-3....2....3
.-5....2...-7....5....0...-5....1....2....2...-6...-1....7....7....1...-4....1
..6....0...-6...-3....4....4....0...-5...-1...-3....2....2...-3....0...-1...-5
.-7...-6....7....4....6....7....3....2....6....2....5...-1...-6....2...-2....0
CROSSREFS
Sequence in context:
A183780
A200842
A187706
*
A239540
A327772
A306746
Adjacent sequences:
A202958
A202959
A202960
*
A202962
A202963
A202964
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Dec 26 2011
STATUS
approved
