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Search: id:A130330
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| 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, 127, 63, 31, 15, 7, 3, 1
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Row sums = A000295: (1, 4, 11, 26, 57, 120, 247,...), the Eulerian numbers.
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FORMULA
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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,...).
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EXAMPLE
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First few rows of the triangle are:
1;
3, 1;
7, 3, 1;
15, 7, 3, 1;
31, 15, 7, 3, 1;
...
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CROSSREFS
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Cf. A130321, A000012, A000225.
Sequence in context: A059090 A133115 A104797 this_sequence A050227 A135540 A053092
Adjacent sequences: A130327 A130328 A130329 this_sequence A130331 A130332 A130333
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), May 24 2007
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