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Search: id:A143802
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| A143802 |
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Triangle read by rows, "n" followed by (n-1) terms of (1, 3, 7, 15,...) |
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+0
1
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| 1, 2, 1, 3, 1, 3, 4, 1, 3, 7, 5, 1, 3, 7, 15, 6, 1, 3, 7, 15, 31, 7, 1, 3, 7, 15, 31, 63, 8, 1, 3, 7, 15, 31, 63, 127, 9, 1, 3, 7, 15, 31, 63, 127, 255, 10, 1, 3, 7, 15, 31, 63, 127, 255, 511
(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 = (2^n - 1)
Sum of terms in n-th row = rightmost term in next row.
1;
2, 1;
3, 1, 3;
4, 1, 3, 7;
5, 1, 3, 7, 15;
6, 1, 3, 7, 15, 31;
7, 1, 3, 7, 15, 31, 63;
...
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FORMULA
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Triangle read by rows, "n" followed by (n-1) terms of (1, 3, 7, 15,...)
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EXAMPLE
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First few rows of the triangle =
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CROSSREFS
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A000225
Sequence in context: A100714 A050123 A081386 this_sequence A163313 A135591 A114897
Adjacent sequences: A143799 A143800 A143801 this_sequence A143803 A143804 A143805
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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), Sep 01 2008
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