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Search: id:A015056
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| A015056 |
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q-Catalan numbers (binomial version) for q=-2. |
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+0
1
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| 1, 1, 5, 77, 5117, 1291677, 1333581405, 5441592632541, 89331571319228381, 5848755670855706968541, 1533967407742898704050818525, 1608089383785066648192844419233245
(list; graph; listen)
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OFFSET
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0,3
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REFERENCES
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Paul Barry, On Integer-Sequence-Based Constructions of Generalized Pascal Triangles, Journal of Integer Sequences, Vol. 9 (2006), Article 06.2.4.
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FORMULA
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{1 / (n+1)_q} {2 n choose n}_q.
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CROSSREFS
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Sequence in context: A028556 A039753 A009485 this_sequence A015973 A136578 A057186
Adjacent sequences: A015053 A015054 A015055 this_sequence A015057 A015058 A015059
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KEYWORD
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nonn,easy
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AUTHOR
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Olivier Gerard (olivier.gerard(AT)gmail.com)
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