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A296772 Triangle read by rows in which row n lists the compositions of n ordered first by decreasing length and then reverse-lexicographically. 9

%I #8 Dec 20 2017 14:41:33

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

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

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

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

%C The ordering of compositions in each row is consistent with the reverse-Mathematica ordering of expressions (cf. A124734).

%C Length of k-th composition is A124748(k-1)+1. - _Andrey Zabolotskiy_, Dec 20 2017

%e Triangle of compositions begins:

%e (1),

%e (11),(2),

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

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

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

%t Table[Reverse[Sort[Join@@Permutations/@IntegerPartitions[n]]],{n,6}]

%Y Cf. A066099, A101211, A108730, A124734, A124748, A228369, A281013, A294859, A296302, A296656, A296773, A296774.

%K nonn,tabf

%O 1,4

%A _Gus Wiseman_, Dec 20 2017

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Last modified April 19 06:16 EDT 2024. Contains 371782 sequences. (Running on oeis4.)