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!)
A204705 T(n,k) = Number of n X k 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..2 introduced in row major order. 8

%I #8 Sep 03 2022 21:59:59

%S 1,2,2,4,14,4,11,96,96,11,30,726,1417,726,30,82,5400,22869,22869,5400,

%T 82,224,40344,362020,835135,362020,40344,224,612,301056,5767683,

%U 29846373,29846373,5767683,301056,612,1672,2247264,91733605,1074195735,2389914827

%N T(n,k) = Number of n X k 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..2 introduced in row major order.

%C Table starts

%C ...1.......2..........4............11...............30..................82

%C ...2......14.........96...........726.............5400...............40344

%C ...4......96.......1417.........22869...........362020.............5767683

%C ..11.....726......22869........835135.........29846373..........1074195735

%C ..30....5400.....362020......29846373.......2389914827........192759130113

%C ..82...40344....5767683....1074195735.....192759130113......34925753412578

%C .224..301056...91733605...38585324821...15521787839696....6319625580942184

%C .612.2247264.1459710274.1386815731346.1250634888842984.1144097011453760287

%H R. H. Hardin, <a href="/A204705/b204705.txt">Table of n, a(n) for n = 1..127</a>

%e Some solutions for n=5, k=3

%e ..0..0..1....0..0..1....0..1..2....0..1..0....0..1..0....0..0..1....0..0..1

%e ..1..0..0....2..0..1....1..1..2....2..1..2....0..1..1....1..2..2....1..0..2

%e ..0..2..1....2..1..2....1..2..1....2..2..1....1..0..2....2..1..2....2..1..1

%e ..0..0..2....1..2..1....0..1..2....0..1..1....1..2..2....2..2..0....0..1..2

%e ..1..0..1....0..2..1....2..1..2....0..0..2....2..0..0....0..1..1....0..2..1

%Y Column 1 is A021006(n-3).

%K nonn,tabl

%O 1,2

%A _R. H. Hardin_, Jan 18 2012

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 06:45 EDT 2024. Contains 371906 sequences. (Running on oeis4.)