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!)
A222000 Number of n X n arrays with each row a permutation of 1..n having at least as many downsteps as the preceding row, with rows in lexicographically nonincreasing order 0

%I #5 Dec 18 2015 18:18:26

%S 1,2,22,2470,16011558,3982479033010,167454529339944721318,

%T 448166024141727075228729619483

%N Number of n X n arrays with each row a permutation of 1..n having at least as many downsteps as the preceding row, with rows in lexicographically nonincreasing order

%C Diagonal of A222005

%e Some solutions for n=3

%e ..2..1..3....2..3..1....2..3..1....3..1..2....3..1..2....2..3..1....2..1..3

%e ..2..1..3....2..3..1....2..1..3....2..1..3....3..1..2....2..3..1....2..1..3

%e ..1..3..2....2..3..1....1..3..2....2..1..3....3..1..2....1..3..2....2..1..3

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 03 2013

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 August 5 16:16 EDT 2024. Contains 374951 sequences. (Running on oeis4.)