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Search: id:A152204
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| A152204 |
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Triangle read by rows, alternate odd terms, decrescendo |
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+0
3
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| 1, 3, 5, 1, 7, 3, 9, 5, 1, 11, 7, 3, 13, 9, 5, 1, 15, 11, 7, 3, 17, 13, 9, 5, 1, 19, 15, 11, 7, 3, 21, 17, 13, 9, 5, 1, 23, 19, 15, 11, 7, 3, 25, 21, 17, 13, 9, 5, 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 = A000217, the triangular numbers.
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FORMULA
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Triangle read by rows, alternate odd terms, decrescendo.
By columns, odd terms in every column, n-th column starts at row (2n-1).
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EXAMPLE
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First few rows of the triangle =
1;
3;
5, 1;
7, 3;
9, 5, 1;
11 7, 3;
13, 9, 5, 1;
15, 11, 7, 3;
17, 13, 9, 5, 1;
19, 15, 11, 7, 3;
21, 17, 13, 9, 5, 1;
...
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CROSSREFS
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A000217
Sequence in context: A124084 A133045 A158858 this_sequence A114216 A086233 A065395
Adjacent sequences: A152201 A152202 A152203 this_sequence A152205 A152206 A152207
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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), Nov 29 2008
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