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!)
A263787 T(n,k) = Number of length n arrays of permutations of 0..n-1 with each element moved by -k to k places and exactly two more elements moved upwards than downwards. 7

%I #7 May 19 2024 20:40:43

%S 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,2,1,0,0,0,0,1,5,10,

%T 3,0,0,0,0,1,5,37,31,11,0,0,0,0,1,5,66,116,134,31,0,0,0,0,1,5,66,267,

%U 572,439,93,0,0,0,0,1,5,66,392,1721,2042,1604,248,0,0,0,0,1,5,66,392,3522

%N T(n,k) = Number of length n arrays of permutations of 0..n-1 with each element moved by -k to k places and exactly two more elements moved upwards than downwards.

%C Table starts

%C .0...0.....0......0......0.......0.......0........0........0........0........0

%C .0...0.....0......0......0.......0.......0........0........0........0........0

%C .0...0.....0......0......0.......0.......0........0........0........0........0

%C .0...0.....1......1......1.......1.......1........1........1........1........1

%C .0...0.....2......5......5.......5.......5........5........5........5........5

%C .0...1....10.....37.....66......66......66.......66.......66.......66.......66

%C .0...3....31....116....267.....392.....392......392......392......392......392

%C .0..11...134....572...1721....3522....4859.....4859.....4859.....4859.....4859

%C .0..31...439...2042...6618...15699...26994....34659....34659....34659....34659

%C .0..93..1604...9298..35203..104014..232208...383663...482272...482272...482272

%C .0.248..5088..35064.144762..463811.1161998..2245936..3388097..4099634..4099634

%C .0.670.17115.149613.741173.2735525.8246455.19777342.37109391.54900952.65762489

%H R. H. Hardin, <a href="/A263787/b263787.txt">Table of n, a(n) for n = 1..424</a>

%e Some solutions for n=7, k=4

%e ..3....3....4....3....1....3....4....3....0....4....0....4....1....0....3....4

%e ..5....1....0....1....0....0....0....0....4....1....5....0....5....5....0....1

%e ..0....6....1....6....6....6....6....1....1....6....6....6....0....1....1....0

%e ..1....0....2....2....2....1....1....5....6....2....2....1....2....2....2....2

%e ..2....2....5....0....3....4....2....2....2....0....1....3....3....6....6....3

%e ..4....4....3....4....5....2....5....4....3....3....4....5....4....3....5....5

%e ..6....5....6....5....4....5....3....6....5....5....3....2....6....4....4....6

%Y Diagonal is A169934.

%K nonn,tabl

%O 1,26

%A _R. H. Hardin_, Oct 26 2015

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 September 16 11:35 EDT 2024. Contains 375965 sequences. (Running on oeis4.)