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

Author

Reinhard Zumkeller, Apr 30 2011

Keywords

• nonn

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

Crossrefs

Cf. A035311, A035313.

Programs

Haskell

-- See link.