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 A180789 Number of distinct solutions of sum{i=1..7}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 1..n-1 1
 0, 1, 15, 198, 2282, 19300, 126861, 670058, 2997685, 11539243, 39660969, 122371876, 348412793, 914595808, 2264326584, 5259342780, 11692554312, 24683815072, 50403390786, 98560661538, 187881799209, 345060981679, 621482071341 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Column 7 of A180793 LINKS R. H. Hardin, Table of n, a(n) for n=1..183 EXAMPLE Solutions for sum of products of 7 1..2 pairs = 1 (mod 3) are (1*1 + 1*1 + 1*1 + 1*1 + 1*1 + 1*1 + 1*1) (1*1 + 1*1 + 1*1 + 1*1 + 1*1 + 1*1 + 2*2) (1*1 + 1*1 + 1*1 + 1*1 + 1*2 + 1*2 + 1*2) (1*1 + 1*1 + 1*1 + 1*1 + 1*1 + 2*2 + 2*2) (1*1 + 1*1 + 1*1 + 1*1 + 2*2 + 2*2 + 2*2) (1*1 + 1*1 + 1*1 + 1*2 + 1*2 + 1*2 + 2*2) (1*1 + 1*1 + 1*1 + 2*2 + 2*2 + 2*2 + 2*2) (1*1 + 1*1 + 1*2 + 1*2 + 1*2 + 2*2 + 2*2) (1*1 + 1*1 + 2*2 + 2*2 + 2*2 + 2*2 + 2*2) (1*1 + 1*2 + 1*2 + 1*2 + 1*2 + 1*2 + 1*2) (1*1 + 1*2 + 1*2 + 1*2 + 2*2 + 2*2 + 2*2) (1*1 + 2*2 + 2*2 + 2*2 + 2*2 + 2*2 + 2*2) (1*2 + 1*2 + 1*2 + 1*2 + 1*2 + 1*2 + 2*2) (1*2 + 1*2 + 1*2 + 2*2 + 2*2 + 2*2 + 2*2) (2*2 + 2*2 + 2*2 + 2*2 + 2*2 + 2*2 + 2*2) CROSSREFS Sequence in context: A185899 A152587 A060337 * A078264 A322914 A014896 Adjacent sequences:  A180786 A180787 A180788 * A180790 A180791 A180792 KEYWORD nonn AUTHOR R. H. Hardin Sep 20 2010 STATUS approved

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Last modified May 28 17:37 EDT 2020. Contains 334684 sequences. (Running on oeis4.)