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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A296774 Triangle read by rows in which row n lists the compositions of n ordered first by length and then reverse-lexicographically. 26

%I #4 Dec 20 2017 14:41:47

%S 1,2,1,1,3,2,1,1,2,1,1,1,4,3,1,2,2,1,3,2,1,1,1,2,1,1,1,2,1,1,1,1,5,4,

%T 1,3,2,2,3,1,4,3,1,1,2,2,1,2,1,2,1,3,1,1,2,2,1,1,3,2,1,1,1,1,2,1,1,1,

%U 1,2,1,1,1,1,2,1,1,1,1,1,6,5,1,4,2,3,3

%N Triangle read by rows in which row n lists the compositions of n ordered first by length and then reverse-lexicographically.

%e Triangle of compositions begins:

%e (1),

%e (2),(11),

%e (3),(21),(12),(111),

%e (4),(31),(22),(13),(211),(121),(112),(1111),

%e (5),(41),(32),(23),(14),(311),(221),(212),(131),(122),(113),(2111),(1211),(1121),(1112),(11111).

%t Table[Sort[Join@@Permutations/@IntegerPartitions[n],Or[Length[#1]<Length[#2],Length[#1]===Length[#2]&&OrderedQ[{#2,#1}]]&],{n,6}]

%Y Cf. A066099, A101211, A108730, A124734, A228369, A281013, A294859, A296302, A296656, A296772, A296773.

%K nonn,tabf

%O 1,2

%A _Gus Wiseman_, Dec 20 2017

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)