|
| |
|
|
A188360
|
|
Number of arrangements of 5 numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero
|
|
1
|
|
|
|
91, 565, 1775, 4201, 8051, 14477, 22583, 34625, 49755, 69749, 91855, 123945, 155779, 197533, 247399, 304785, 361755, 440021, 512415, 611097, 715123, 826765, 936711, 1090865, 1233531, 1393541, 1568623, 1774089, 1955795, 2212029, 2421127, 2686881
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
Some solutions for n=4
..4....1....4...-3...-2...-1....1...-4...-3....2....3...-1....1....3...-2....0
..1...-4....3....1....0....3....3...-3....0....0....0....0....0...-1....2....0
..1....4...-2...-2...-1....0....3....0...-4...-2...-2....3....4...-3....2...-2
.-1....4....2...-1....0...-1...-2...-3....0....0....0....3....0....1...-1....0
..4....1...-1...-3....0...-3....3....4....1....1....2...-3...-4....3...-2....2
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
