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A028376
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Triangle read by rows: T(n,m) = Sum Catalan(n-k)*Catalan(k), k=0..m.
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2
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0, 0, 1, 0, 1, 2, 0, 2, 3, 5, 0, 5, 7, 9, 14, 0, 14, 19, 23, 28, 42, 0, 42, 56, 66, 76, 90, 132, 0, 132, 174, 202, 227, 255, 297, 429, 0, 429, 561, 645, 715, 785, 869, 1001, 1430, 0, 1430, 1859, 2123, 2333, 2529, 2739, 3003, 3432, 4862, 0, 4862, 6292, 7150
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,6
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EXAMPLE
| 0; 0,1; 0,1,2; 0,2,3,5; 0,5,7,9,14; 0,14,19,23,28,42; ...
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CROSSREFS
| See A028364 for a better version. Cf. A028377, A028378.
Sequence in context: A141692 A063180 A141693 * A059235 A178516 A072514
Adjacent sequences: A028373 A028374 A028375 * A028377 A028378 A028379
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KEYWORD
| tabl,nonn,easy
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AUTHOR
| Wouter Meeussen (wouter.meeussen(AT)pandora.be)
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