A130851 Catalan numbers A000108(n) modulo 9.

1, 1, 2, 5, 5, 6, 6, 6, 8, 2, 2, 7, 4, 4, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 8, 2, 2, 4, 1, 1, 3, 3, 3, 1, 7, 7, 2, 5, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 6, 6, 3, 3, 3, 0, 0, 0, 3, 3, 3, 6, 6, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 2, 2, 4, 1, 1, 3, 3, 3, 7, 4, 4, 5, 8, 8, 0, 0, 0, 3, 3, 3, 6, 6, 6, 0

Offset

0,3

Links

Table of n, a(n) for n=0..104.

Formula

a(n) = A000108(n) mod 9. - Philippe Deléham, Apr 28 2009

Mathematica

Mod[CatalanNumber[Range[0, 120]], 9] (* Harvey P. Dale, Feb 20 2018 *)

Crossrefs

Cf. A000108, A010888, A130856.

Sequence in context: A270705 A073101 A235526 * A130856 A004095 A145434

Adjacent sequences: A130848 A130849 A130850 * A130852 A130853 A130854

Keyword

nonn,easy,base

Author

N. J. A. Sloane, Aug 21 2007

Extensions

Name corrected by Nathaniel Johnston, May 05 2011

Status

approved