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Search: id:A127701
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| A127701 |
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Infinite lower triangular matrix with (1, 2, 3,...) in the main diagonal, (1, 1, 1,...) in the subdiagonal and the rest zeros. |
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+0
20
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| 1, 1, 2, 0, 1, 3, 0, 0, 1, 4, 0, 0, 0, 1, 5, 0, 0, 0, 0, 1, 6, 0, 0, 0, 0, 0, 1, 7, 0, 0, 0, 0, 0, 0, 1, 8, 0, 0, 0, 0, 0, 0, 0, 1, 9, 0, 0, 0, 0, 0, 0, 0, 0, 1, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
(list; table; graph; listen)
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OFFSET
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1,3
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COMMENT
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Eigensequence of the triangle = A001040 starting (1, 3, 10, 43, 225,...). [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Dec 29 2008]
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EXAMPLE
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First few rows of the triangle are:
1;
1, 2;
0, 1, 3;
0, 0, 1, 4;
0, 0, 0, 1, 5;
0, 0, 0, 0, 1, 6;
0, 0, 0, 0, 0, 1, 7;
...
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CROSSREFS
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A001040 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Dec 29 2008]
Sequence in context: A085855 A128132 A158821 this_sequence A004199 A062283 A136493
Adjacent sequences: A127698 A127699 A127700 this_sequence A127702 A127703 A127704
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KEYWORD
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nonn,easy,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 23 2007
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EXTENSIONS
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More terms from Jon E. Schoenfield (jonscho(AT)hiwaay.net), May 26 2007
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