Search: id:A133602
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%I A133602
%S A133602 1,2,2,7,14,56,132,561,1430,6292
%N A133602 A133080 * A000108.
%C A133602 A133603 is a companion sequence.
%F A133602 A133080 * A000108, where A133080 = an infinite lower triangular matrix 
               and A000108 = the Catalan sequence as a vector. For even indexed 
               terms, a(n) = C(n). For odd indexed terms a(n) = C(n) + C(n-1).
%e A133602 a(4) = C(4) = 14.
%e A133602 a(5) = 56 = C(5) + C(4) = 42 + 14.
%Y A133602 Cf. A097806, A133080, A000108, A133603.
%Y A133602 Sequence in context: A162460 A061274 A061575 this_sequence A137249 A051769 
               A049955
%Y A133602 Adjacent sequences: A133599 A133600 A133601 this_sequence A133603 A133604 
               A133605
%K A133602 nonn
%O A133602 0,2
%A A133602 Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 18 2007

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