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Search: id:A135856
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| A135856 |
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A007318 * a bidiagonal matrix with all 1's in the main diagonal and all 4's in the subdiagonal. |
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+0
2
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| 1, 5, 1, 9, 6, 1, 13, 15, 7, 1, 17, 28, 22, 8, 1, 21, 45, 50, 30, 9, 1, 25, 66, 95, 80, 39, 10, 1, 29, 91, 161, 175, 119, 49, 11, 1, 33, 120, 252, 336, 294, 168, 60, 12, 1, 37, 153, 372, 588, 630, 462, 228, 72, 13, 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 = A048487: (1, 6, 16, 36, 76,...).
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FORMULA
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Binomial transform of an infinite lower triangular matrix with all 1's in the main diagonal and all 4's in the subdiagonal (by columns, (1, 4, 0, 0, 0,...) in every column.
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EXAMPLE
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First few rows of the triangle are:
1;
5, 1;
9, 6, 1;
13, 15, 7, 1;
17, 28, 22, 8, 1;
21, 45, 50, 30, 9, 1;
25, 66, 95, 80, 39, 10, 1;
...
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CROSSREFS
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Cf. A048487.
Sequence in context: A094650 A129343 A010482 this_sequence A097414 A114594 A021662
Adjacent sequences: A135853 A135854 A135855 this_sequence A135857 A135858 A135859
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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), Dec 01 2007
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