A051785 - OEIS

A051785

Number of letters in n-th Catalan number.

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

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

EXAMPLE