login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Size of the parenthesizations obtained with the global ranking/unranking scheme A072646/A072647.
7

%I #2 May 01 2014 02:43:29

%S 0,1,2,3,2,4,3,3,5,3,4,4,4,7,4,4,5,3,6,5,5,9,4,5,5,5,6,4,5,7,6,6,6,5,

%T 10,5,4,5,4,5,6,6,6,4,5,6,5,8,7,7,7,6,8,6,7,11,5,6,5,6,6,5,4,6,7,6,6,

%U 6,8,5,6,7,5,7,6,6,10,8,7,7,7,7,7,8,8,7,7,8,6,12,6,5,6,4,7,7,7,8,5,6,5,6

%N Size of the parenthesizations obtained with the global ranking/unranking scheme A072646/A072647.

%Y Each value v occurs A000108(v) times. The maximum position for value v to occur is A072654(v). Permutations: A071673, A072643, A072644, A072660.

%K nonn

%O 0,3

%A _Antti Karttunen_, Jun 02 2002