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Search: id:A079508
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| A079508 |
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Triangle T(n,k) (n>=2, k>=1) of Raney numbers read by rows. |
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+0
2
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| 1, 0, 1, 0, 1, 1, 0, 0, 5, 1, 0, 0, 5, 9, 1, 0, 0, 0, 21, 14, 1, 0, 0, 0, 14, 56, 20, 1, 0, 0, 0, 0, 84, 120
(list; table; graph; listen)
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OFFSET
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2,9
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COMMENT
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There are only m nonzero entries in the m-th column.
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REFERENCES
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G. Kreweras, Les preordres totaux compatibles avec un ordre partiel. Math. Sci. Humaines No. 53 (1976), 5-30.
G. N. Raney, Functional composition patterns and power series reversion, Trans. Amer. Math. Soc., 94 (1960), pp. 441-.
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FORMULA
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How are these defined?
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EXAMPLE
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1; 0,1; 0,1,1; 0,0,5,1; 0,0,5,9,1; ...
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CROSSREFS
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Sum of nonzero entries in each column gives A001003. Alternating sum of each column is 1. Leading Second diagonal gives A079509.
Sequence in context: A129205 A098173 A058177 this_sequence A007912 A019755 A085475
Adjacent sequences: A079505 A079506 A079507 this_sequence A079509 A079510 A079511
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KEYWORD
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nonn,tabl,more
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jan 21 2003
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