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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; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Row sums = A000295: (1, 4, 11, 26, 57, 120, 247,...), the Eulerian numbers.
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FORMULA
| 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
| 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
| Cf. A130321, A000012, A000225.
Sequence in context: A059090 A133115 A104797 * A050227 A135540 A161942
Adjacent sequences: A130327 A130328 A130329 * A130331 A130332 A130333
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), May 24 2007
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