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A051785
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Number of letters in n-th Catalan number.
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0
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2, 3, 4, 6, 4, 3, 3, 4, 3, 3, 4, 5, 6, 7, 6, 5, 6, 6, 5, 4, 7, 8, 9, 11, 9, 8, 8, 9, 8, 6, 8, 9, 10, 12, 10, 9, 9, 10, 9, 8, 10, 11, 12, 14, 12, 11, 11, 12, 11, 9, 11, 12, 13, 15, 13, 12, 12, 13, 12, 8, 10, 11, 12, 14, 12, 11, 11, 12, 11, 7, 9, 10, 11, 13, 11, 10, 10, 11, 10, 8, 10, 11
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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REFERENCES
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J. Gili, Catalan Grammar, Dolphin. Oxford 1993, p. 39.
R. P. Stanley, Enumerative Combinatorics, vol. 2, problem 6.24.
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LINKS
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Table of n, a(n) for n=1..82.
Amer. Math. Monthly 103 (1996), see pages 538 and 577.
Catalan Institute of America, Home Page
Index entries for sequences related to number of letters in n
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EXAMPLE
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In Catalan: un, dos, tres, quatre, cinc, sis, set, vuit, nou, deu, onze, dotze, tretze, catorze, quinze, setze, disset, divuit, dinou, vint, ...
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CROSSREFS
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Cf. A000108, A005589.
Sequence in context: A321479 A128332 A074103 * A144825 A159633 A049044
Adjacent sequences: A051782 A051783 A051784 * A051786 A051787 A051788
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KEYWORD
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nonn,easy,word,nice
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AUTHOR
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N. J. A. Sloane and Richard Borcherds, Dec 09 1999
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EXTENSIONS
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More terms from F. Xavier Noria (fxn(AT)retemail.es) and Manuel Valdivia Prades (mvaldivia(AT)ugr.es), Dec 10 1999
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STATUS
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approved
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