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A141289
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Triangle read by rows, n-th row = (n-2)-th row appended to the beginning of (n-1)-th row, + n.
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1
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1, 1, 2, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 1, 2, 1, 1, 2, 3, 4, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 6, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 1, 2, 1, 1, 2, 3, 4, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 6, 7
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| There are (1, 2, 4, 7, 12,...) terms per row where (0, 0, 1, 2, 4, 7, 12,...) = A000071 = Fibonacci numbers - 1.
Row sums = A001924: (1, 3, 7, 14, 26, 46,...)
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FORMULA
| Triangle read by rows, n-th row = (n-2)-th row appended to the beginning of (n-1)-th row, + n.
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EXAMPLE
| First few rows of the triangle are:
1;
1, 2;
1, 1, 2, 3;
1, 2, 1, 1, 2, 3, 4;
1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5;
1, 2, 1, 1, 2, 3, 4, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 5, 6;
...
Row 4 = (1, 2, 1, 1, 2, 3, 4) = (row 2 appended to row 3, + 4); = (1, 2) appended to (1, 1, 2, 3), then 4.
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CROSSREFS
| Cf. A000071, A001924.
Sequence in context: A180262 A161789 A109671 * A177219 A140191 A048207
Adjacent sequences: A141286 A141287 A141288 * A141290 A141291 A141292
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KEYWORD
| nonn,tabf
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 22 2008
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