Search: id:A122759
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%I A122759
%S A122759 1,0,0,1,3,9,0,0,0,0,1,3,9,27,81,0,0,0,0,0,0,1,3,9,27,81,243,729,0,0,0,
%T A122759 0,0,0,0,0,1,3,9,27,81,243,729,2187,6561,0,0,0,0,0,0,0,0,0,0,1,3,9,27,
%U A122759 81,243,729,2187,6561,19683,59049
%N A122759 Cantor based power of three triangular array: t(n,m)=3^n*(1-Mod[n,2]).
%D A122759 Counterexamples in Topology by Lynn Arthur Steen and J. Arthur Seebach, 
               Jr., Dover, New York,1978,57-58
%F A122759 t(n,m)=3^n*(1-Mod[n,2])
%e A122759 1
%e A122759 0, 0
%e A122759 1, 3, 9
%e A122759 0, 0, 0, 0
%e A122759 1, 3, 9, 27, 81
%e A122759 0, 0, 0, 0, 0, 0
%e A122759 1, 3, 9, 27, 81, 243, 729
%t A122759 a[n_] := 1 - Mod[n, 2] T1[n_, m_] := 3^n*a[m] a0 = Table[Table[T1[n, 
               m], {n, 0, m}], {m, 0, 10}]; Flatten[a0] MatrixForm[a0]
%Y A122759 Sequence in context: A063103 A058847 A088110 this_sequence A016626 A126321 
               A021260
%Y A122759 Adjacent sequences: A122756 A122757 A122758 this_sequence A122760 A122761 
               A122762
%K A122759 nonn,tabl,uned
%O A122759 1,5
%A A122759 Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 21 2006

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