OFFSET
1,5
COMMENTS
LINKS
Peter Luschny, Permutations with Lehmer, a SageMath Jupyter Notebook.
EXAMPLE
[1] [1]
[2] [0, 1]
[3] [0, 2, 1]
[4] [0, 3, 9, 1]
[5] [0, 5, 41, 24, 1]
[6] [0, 8, 150, 247, 55, 1]
[7] [0, 14, 494, 1746, 1074, 118, 1]
[8] [0, 24, 1537, 10126, 13110, 4050, 245, 1]
[9] [0, 43, 4642, 52129, 122521, 79396, 14111, 500, 1]
[10][0, 77, 13745, 248494, 967644, 1126049, 425471, 46833, 1011, 1]
.
The 5 irreducible permutations counted with T(5, 2) are 23451, 51234, 31524, 34512, and 45123.
PROG
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Peter Luschny, Aug 01 2022
STATUS
approved