|
|
A180817
|
|
Number of distinct solutions of sum{i=1..5}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 2..n-2
|
|
1
|
|
|
0, 0, 0, 1, 7, 57, 286, 1701, 5969, 22212, 59824, 173319, 385060, 920819, 1831674, 3839358, 6872225, 13243078, 21945628, 39182616, 61892080, 103355368, 155139308, 251041955, 359562489, 554717344, 780642911, 1160794113, 1574984248
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,5
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Solutions for sum of products of 5 2..3 pairs = 0 (mod 5) are
(2*2 + 2*2 + 2*2 + 2*2 + 2*2) (2*2 + 2*2 + 2*2 + 2*2 + 3*3)
(2*2 + 2*2 + 2*2 + 3*3 + 3*3) (2*2 + 2*2 + 3*3 + 3*3 + 3*3)
(2*2 + 3*3 + 3*3 + 3*3 + 3*3) (2*3 + 2*3 + 2*3 + 2*3 + 2*3)
(3*3 + 3*3 + 3*3 + 3*3 + 3*3)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|