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A039964 Motzkin numbers A001006 read mod 3. 9
1, 1, 2, 1, 0, 0, 0, 1, 2, 1, 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 1, 1, 2, 1, 0, 0, 0, 1, 2, 1, 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 1, 1, 2, 1, 0, 0, 0, 1, 2, 1, 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

An example of a d-perfect sequence.

LINKS

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

Anders Hyllengren, Letter to N. J. A. Sloane, Oct 04 1985

D. Kohel, S. Ling and C. Xing, Explicit Sequence Expansions, in Sequences and their Applications, C. Ding, T. Helleseth, and H. Niederreiter, eds., Proceedings of SETA'98 (Singapore, 1998), 308-317, 1999.

FORMULA

a(n) = A001006(n) mod 3. - Christian G. Bower, Jun 12 2005

PROG

(PARI) a001006(n) = polcoeff((1-x-sqrt((1-x)^2-4*x^2+x^3*O(x^n)))/(2*x^2), n);

vector(200, n, n--; a001006(n) % 3) \\ Altug Alkan, Oct 23 2015

CROSSREFS

Cf. A001006.

Motzkin numbers A001006 read mod 2,3,4,5,6,7,8,11: A039963, A039964, A299919, A258712, A299920, A258711, A299918, A258710.

Sequence in context: A280456 A103633 A026821 * A035172 A110174 A022909

Adjacent sequences:  A039961 A039962 A039963 * A039965 A039966 A039967

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Christian G. Bower, Jun 12 2005

Offset adapted by Altug Alkan, Oct 23 2015

STATUS

approved

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Last modified November 19 04:22 EST 2018. Contains 317333 sequences. (Running on oeis4.)