OFFSET
0,3
COMMENTS
Any n that occurs in the sequence, occurs for the first time at n (i.e. a(n)=n), thus there are no cases where a(n) > n. A001190(n+1) distinct values occur in each range [A014137(n-1)..A014138(n-1)]. This sequence is similar to A127302 in that it maps all the plane binary trees which belong to the same equivalence class of non-oriented binary trees to one and same integer and likewise, every Catalan bijection whose signature permutation SP satisfies the condition mentioned in A127302, satisfies in a similar way A153835(SP(n)) = A153835(n).
LINKS
A. Karttunen, Table of n, a(n) for n = 0..2055
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 05 2009
STATUS
approved