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Search: id:A087727
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| A087727 |
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Triangle read by rows: T(n,k) = (2 * (binom(n,k)) * (n + 2 * k + 3)!)/((k + 1)! * (k + 2)! * (n + 3)!). |
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+0
2
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| 1, 1, 5, 1, 14, 42, 1, 28, 210, 462, 1, 48, 660, 3432, 6006, 1, 75, 1650, 15015, 60060, 87516, 1, 110, 3575, 50050, 340340, 1108536, 1385670, 1, 154, 7007, 140140, 1429428, 7759752, 21339318, 23371634, 1, 208, 12740, 346528, 4938024, 39504192
(list; table; graph; listen)
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OFFSET
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0,3
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EXAMPLE
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1; 1,5; 1,14,42; 1,28,210,462; ...
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CROSSREFS
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Row sums give A087659.
Sequence in context: A104792 A120393 A094368 this_sequence A039807 A157395 A157385
Adjacent sequences: A087724 A087725 A087726 this_sequence A087728 A087729 A087730
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KEYWORD
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nonn,tabl,easy
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AUTHOR
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R. William Gosper (rwg(AT)tc.spnet.com), Sep 30 2003
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EXTENSIONS
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More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Sep 30 2003
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