A180824 Number of distinct solutions of Sum_{i=1..1} x(2i-1)*x(2i) = 1 (mod n), with x() only in 2..n-2.

0, 0, 0, 0, 1, 0, 2, 2, 2, 1, 4, 2, 5, 2, 4, 4, 7, 2, 8, 4, 6, 4, 10, 6, 9, 5, 8, 6, 13, 4, 14, 8, 10, 7, 12, 6, 17, 8, 12, 10, 19, 6, 20, 10, 12, 10, 22, 10, 20, 9, 16, 12, 25, 8, 20, 14, 18, 13, 28, 10, 29, 14, 18, 16, 24, 10, 32, 16, 22, 12, 34, 14, 35, 17, 20, 18, 30, 12, 38, 18, 26, 19, 40

Offset

1,7

Comments

Column 1 of A180834.

Links

R. H. Hardin, Table of n, a(n) for n=1..10000

Crossrefs

Cf. A180834.

Sequence in context: A351112 A089400 A239209 * A105777 A014572 A071458

Adjacent sequences: A180821 A180822 A180823 * A180825 A180826 A180827

Keyword

nonn

Author

R. H. Hardin, Sep 20 2010

Status

approved