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 A051785 Number of letters in n-th Catalan number. 0
 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)
 OFFSET 1,1 REFERENCES J. Gili, Catalan Grammar, Dolphin. Oxford 1993, p. 39. R. P. Stanley, Enumerative Combinatorics, vol. 2, problem 6.24. LINKS Amer. Math. Monthly 103 (1996), see pages 538 and 577. Catalan Institute of America, Home Page EXAMPLE In Catalan: un, dos, tres, quatre, cinc, sis, set, vuit, nou, deu, onze, dotze, tretze, catorze, quinze, setze, disset, divuit, dinou, vint, ... CROSSREFS Cf. A000108, A005589. Sequence in context: A260272 A128332 A074103 * A144825 A159633 A049044 Adjacent sequences:  A051782 A051783 A051784 * A051786 A051787 A051788 KEYWORD nonn,easy,word,nice AUTHOR N. J. A. Sloane and Richard Borcherds, Dec 09 1999 EXTENSIONS More terms from F. Xavier Noria (fxn(AT)retemail.es) and Manuel Valdivia Prades (mvaldivia(AT)ugr.es), Dec 10 1999 STATUS approved

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Last modified October 23 22:04 EDT 2018. Contains 316541 sequences. (Running on oeis4.)