%I #3 Mar 30 2012 18:37:02

%S 1,4,14,52,217,1033,5604,34416,237328,1822753,15473117,144165763,

%T 1464992791,16144683412,191967912402,2451561765083,33487399558154,

%U 487448547177703,7535687673952024,123349262218035648

%N Column 3 of table A125781; also, equals column 1 of matrix power A091351^2.

%C Column k of triangle A091351 = row sums of matrix power A091351^k for k>=0.

%F a(n) = A091352(n+2) - A091352(n+1) - 1.

%Y Cf. A091351; other columns: A091352, A125782, A125784, A125785, A125786.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 09 2006