cp's OEIS Frontend

A107722 Matrix square of triangle A107721, read by rows.

%I A107722 #3 Mar 30 2012 18:36:46
%S A107722 1,2,1,12,4,1,114,32,6,1,1446,364,62,8,1,22722,5276,854,102,10,1,
%T A107722 424302,92332,14466,1664,152,12,1,9168162,1889012,289222,32536,2874,
%U A107722 212,14,1,224961774,44207212,6652522,737472,63886,4564,282,16,1,6180211842
%N A107722 Matrix square of triangle A107721, read by rows.
%C A107722 Matrix (2/3)-power of triangle A107717. SHIFT_LEFT of column 0 = 2*(column 1 of A107717). Matrix inverse is A107728.
%e A107722 Triangle begins:
%e A107722 1;
%e A107722 2,1;
%e A107722 12,4,1;
%e A107722 114,32,6,1;
%e A107722 1446,364,62,8,1;
%e A107722 22722,5276,854,102,10,1;
%e A107722 424302,92332,14466,1664,152,12,1;
%e A107722 9168162,1889012,289222,32536,2874,212,14,1; ...
%o A107722 (PARI)
%Y A107722 Cf. A107717, A107721, A107728.
%K A107722 nonn,tabl
%O A107722 0,2
%A A107722 _Paul D. Hanna_, May 30 2005