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Search: id:A132808
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| 1, 2, 1, 5, 3, 1, 14, 6, 6, 1, 42, 10, 20, 10, 1, 132, 15, 50, 50, 15, 1, 429, 21, 105, 175, 105, 21, 1, 1430, 28, 196, 490, 490, 196, 28, 1, 4862, 36, 336, 11761764, 1176, 336, 36, 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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Replace left border of the Narayana triangle A001263 with the Catalan sequence A000108 starting (1, 2, 5, 14, 42,...).
Row sums = A131428 starting (1, 3, 9, 27, 83,...).
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1
5, 3, 1;
14, 6, 6, 1;
42, 10, 20, 10, 1;
132, 15, 50, 50, 15, 1;
...
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CROSSREFS
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Cf. A000108, A001263, A103451.
Sequence in context: A048472 A038622 A112339 this_sequence A135233 A125170 A054445
Adjacent sequences: A132805 A132806 A132807 this_sequence A132809 A132810 A132811
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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), Aug 31 2007
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EXTENSIONS
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Definition corrected by Philippe DELEHAM, Oct 11 2007
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