Search: id:A130330
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%I A130330
%S A130330 1,3,1,7,3,1,15,7,3,1,31,15,7,3,1,63,31,15,7,3,1,127,63,31,15,7,3,1,255,
%T A130330 127,63,31,15,7,3,1
%N A130330 A130321 * A000012.
%C A130330 Row sums = A000295: (1, 4, 11, 26, 57, 120, 247,...), the Eulerian numbers.
%F A130330 A130321 * A000012 as infinite lower triangular matrices, where A130321 
               = (1; 2,1; 4,2,1;...) and A000012 = (1; 1,1; 1,1,1;...). A000225, 
               (2^n-1), in every column: (1, 3, 7, 15,...).
%e A130330 First few rows of the triangle are:
%e A130330 1;
%e A130330 3, 1;
%e A130330 7, 3, 1;
%e A130330 15, 7, 3, 1;
%e A130330 31, 15, 7, 3, 1;
%e A130330 ...
%Y A130330 Cf. A130321, A000012, A000225.
%Y A130330 Sequence in context: A059090 A133115 A104797 this_sequence A050227 A135540 
               A161942
%Y A130330 Adjacent sequences: A130327 A130328 A130329 this_sequence A130331 A130332 
               A130333
%K A130330 nonn,tabl
%O A130330 1,2
%A A130330 Gary W. Adamson (qntmpkt(AT)yahoo.com), May 24 2007

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