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A180787 Number of distinct solutions of sum{i=1..5}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 1..n-1 1
0, 1, 5, 64, 400, 1914, 7589, 24902, 73134, 188315, 455127, 996083, 2098908, 4080930, 7790731, 13869018, 24527424, 40768032, 67955336, 106952861, 169909977, 255608028, 390623704, 566247614, 837326375, 1175991196, 1690928973 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Column 5 of A180793
LINKS
EXAMPLE
Solutions for sum of products of 5 1..2 pairs = 1 (mod 3) are
(1*1 + 1*1 + 1*1 + 1*2 + 1*2) (1*1 + 1*1 + 1*2 + 1*2 + 2*2)
(1*1 + 1*2 + 1*2 + 2*2 + 2*2) (1*2 + 1*2 + 1*2 + 1*2 + 1*2)
(1*2 + 1*2 + 2*2 + 2*2 + 2*2)
CROSSREFS
Sequence in context: A193834 A193875 A193184 * A222455 A351855 A178295
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 20 2010
STATUS
approved

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Last modified March 19 02:51 EDT 2024. Contains 370952 sequences. (Running on oeis4.)