A189713 Central terms of Zorach additive triangle (cf. A035312).

1, 6, 23, 56, 168, 459, 1080, 2400, 5461, 12678, 28728, 63336, 138717, 303346, 663179, 1438098, 3062730, 6450121, 13583957, 28627773, 59954459, 124413466, 258510987, 543867101, 1152248068, 2428235533, 5069886692, 10511339217, 21696371682, 44710463120

Offset

0,2

Comments

a(n) = A035312(2*n,n).

Links

Reinhard Zumkeller, Table of n, a(n) for n = 0..500

A. C. Zorach, Additive triangle

Haskell programs for sequences in connection with Zorach additive triangle

Prog

See link for Haskell program.

Crossrefs

Cf. A035311, A035313.

Sequence in context: A272922 A234729 A273500 * A162267 A009017 A273540

Adjacent sequences: A189710 A189711 A189712 * A189714 A189715 A189716

Keyword

nonn

Author

Reinhard Zumkeller, Apr 30 2011

Status

approved