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Secondary diagonal of triangle A122890.
3

%I #3 Mar 30 2012 18:36:59

%S 1,10,70,424,2382,12804,66946,343772,1744314,8780912,43976688,

%T 219546976,1094132461,5448766458,27135655714,135218356264,

%U 674461583180,3368432133000,16847360404260,84396523333080,423485559461250

%N Secondary diagonal of triangle A122890.

%C The main diagonal of triangle A122890 equals the Catalan numbers (A000108); this is the diagonal immediately below (with leading zeros omitted).

%Y Cf. A122890, A122888; A122887.

%K nonn

%O 4,2

%A _Paul D. Hanna_, Sep 18 2006