A220450 a(n) = A220449(n) mod 19.

1, 1, 9, 10, 0, 11, 11, 2, 6, 12, 15, 9, 0, 17, 15, 4, 1, 17, 2, 17, 17, 1, 18, 0, 16, 16, 15, 7, 14, 8, 1, 0, 4, 8, 11, 17, 4, 15, 4, 4, 17, 2, 0, 6, 6, 8, 5, 10, 3, 17, 0, 11, 3, 16, 4, 11, 8, 11, 11, 4, 15, 0, 7, 7, 3, 9, 18, 13, 4, 0, 16, 13, 6, 11, 16, 3, 16, 16, 11, 8, 0, 5, 5, 13, 1, 2, 12

Offset

1,3

Links

Table of n, a(n) for n=1..87.

V. H. Moll, An arithmetic conjecture on a sequence of arctangent sums, 2012.

Crossrefs

Cf. A220449.

Sequence in context: A226050 A058200 A067450 * A318147 A324663 A109409

Adjacent sequences: A220447 A220448 A220449 * A220451 A220452 A220453

Keyword

nonn

Author

N. J. A. Sloane, Dec 22 2012

Status

approved