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A180828
Number of distinct solutions of sum{i=1..5}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 2..n-2
1
0, 0, 0, 0, 3, 29, 286, 1252, 5910, 18058, 59820, 147057, 385126, 808153, 1819415, 3419890, 6872235, 11853812, 21945574, 35503801, 61441639, 94283546, 155139350, 227922254, 359372638, 509599423, 774249654, 1067712369, 1574987136
OFFSET
1,5
COMMENTS
Column 5 of A180834
LINKS
EXAMPLE
Solutions for sum of products of 5 2..3 pairs = 1 (mod 5) are
(2*2 + 2*2 + 2*3 + 2*3 + 2*3) (2*2 + 2*3 + 2*3 + 2*3 + 3*3)
(2*3 + 2*3 + 2*3 + 3*3 + 3*3)
CROSSREFS
Sequence in context: A224754 A162928 A124263 * A026130 A026159 A025186
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 20 2010
STATUS
approved