A179752 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A179752

Maximum depth of parenthesizations encoded by A014486, or correspondingly, maximum height for the equivalent general trees.

0, 1, 1, 2, 1, 2, 2, 2, 3, 1, 2, 2, 2, 3, 2, 2, 2, 2, 3, 3, 3, 3, 4, 1, 2, 2, 2, 3, 2, 2, 2, 2, 3, 3, 3, 3, 4, 2, 2, 2, 2, 3, 2, 2, 2, 2, 3, 3, 3, 3, 4, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 1, 2, 2, 2, 3, 2, 2, 2, 2, 3, 3, 3, 3, 4, 2, 2, 2, 2, 3, 2, 2, 2, 2, 3, 3, 3, 3, 4, 3, 3, 3, 3, 3, 3, 3, 3, 4

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,4

COMMENTS

Each integer n appears first at position given by A014138.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..2055

EXAMPLE

The terms A014486[1..8] encode the following rooted plane general trees:

.1.......2.......3.......4.......5.......6.......7.......8.

...........................................................

.........................................................o.

.........................................................|.

.................o.................o...o.......o...o.....o.

.................|.................|...|........\./......|.

.o.....o...o.....o.....o.o.o...o...o...o...o.....o.......o.

.|......\./......|......\|/.....\./.....\./......|.......|.

.*.......*.......*.......*.......*.......*.......*.......*.

and the corresponding parenthesizations:

.().....()()....(())...()()()..()(())..(())()..(()())..((()))

thus a(1)=1, a(2)=1, a(3)=2, a(4)=1, a(5)=2, a(6)=2, a(7)=2, a(8)=3.

MATHEMATICA

blist[m_] := Select[Map[Accumulate, Permutations[PadLeft[Table[1, m], 2*m, -1]]], Min[#] >= 0 &]; Join[{{0}}, Array[Map[Max, blist[#]] &, 6]] (* Paolo Xausa, Mar 04 2024 *)

CROSSREFS

Cf. A179751, A126303, A126304, A080237, A085197.

Sequence in context: A285797 A362746 A131840 * A085693 A067995 A135551

Adjacent sequences: A179749 A179750 A179751 * A179753 A179754 A179755

KEYWORD

nonn,base

AUTHOR

Antti Karttunen, Aug 03 2010

STATUS

approved