1,2

Complement of A005823.

n such that central Delannoy number A001850(n) == 0 (mod 3). - Emeric Deutsch and Bruce E. Sagan, Dec 04 2003

Table of n, a(n) for n=1..71.

Johann Cigler, Some elementary observations on Narayana polynomials and related topics, arXiv:1611.05252 [math.CO], 2016. See p.25.

Cf. A007089, A062756, A081609, A081605, A074940.

Sequence in context: A180152 A162610 A155935 * A079945 A283736 A039017

Adjacent sequences: A081603 A081604 A081605 * A081607 A081608 A081609

nonn,base

Reinhard Zumkeller, Mar 23 2003

More terms from Emeric Deutsch and Bruce E. Sagan, Dec 04 2003

approved