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Search: id:A104796
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| A104796 |
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Triangle T(n,k) = (n-k)*Fib(n-k), n>=1, 0<=k<n, read by rows. |
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+0
1
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| 1, 4, 1, 9, 4, 1, 20, 9, 4, 1, 40, 20, 9, 4, 1, 78, 40, 20, 9, 4, 1, 147, 78, 40, 20, 9, 4, 1, 272, 147, 78, 40, 20, 9, 4, 1, 495, 272, 147, 78, 40, 20, 9, 4, 1, 890, 495, 272, 147, 78, 40, 20, 9, 4, 1, 1584, 890, 495, 272, 147, 78, 40, 20, 9, 4, 1, 2796, 1584, 890, 495, 272
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Repeatedly writing the sequence A023607 backwards.
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FORMULA
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T(n,k) = A023607(n-k); a(n) = A023607(A004736(n)).
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EXAMPLE
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First few rows of the triangle are:
1;
4, 1;
9, 4, 1;
20, 9, 4, 1;
40, 20, 9, 4, 1;
78, 40, 20, 9, 4, 1;
...
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CROSSREFS
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Row sums are in A094584.
Cf. A104762, A104765, A000045.
Sequence in context: A153265 A085691 A055461 this_sequence A132020 A143864 A073364
Adjacent sequences: A104793 A104794 A104795 this_sequence A104797 A104798 A104799
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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), Mar 26 2005
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EXTENSIONS
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Edited by Ralf Stephan, Apr 05 2009
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