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!)
A300115 T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 7

%I #4 Feb 25 2018 06:31:58

%S 0,1,1,1,3,1,2,7,7,2,3,13,15,13,3,5,23,29,29,23,5,8,49,63,112,63,49,8,

%T 13,99,199,515,515,199,99,13,21,189,629,2713,3776,2713,629,189,21,34,

%U 383,1837,12669,28935,28935,12669,1837,383,34,55,777,5397,59569,212470

%N T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Table starts

%C ..0...1....1......2........3.........5...........8............13.............21

%C ..1...3....7.....13.......23........49..........99...........189............383

%C ..1...7...15.....29.......63.......199.........629..........1837...........5397

%C ..2..13...29....112......515......2713.......12669.........59569.........295903

%C ..3..23...63....515.....3776.....28935......212470.......1560065.......11874071

%C ..5..49..199...2713....28935....346593.....4293657......52304635......651028308

%C ..8..99..629..12669...212470...4293657....87633085....1730369641....35186245661

%C .13.189.1837..59569..1560065..52304635..1730369641...55075362479..1818989406366

%C .21.383.5397.295903.11874071.651028308.35186245661.1818989406366.98018916520293

%H R. H. Hardin, <a href="/A300115/b300115.txt">Table of n, a(n) for n = 1..180</a>

%F Empirical for column k:

%F k=1: a(n) = a(n-1) +a(n-2)

%F k=2: a(n) = 2*a(n-1) -a(n-2) +4*a(n-3) -4*a(n-4) for n>5

%F k=3: [order 16] for n>17

%F k=4: [order 56] for n>60

%e Some solutions for n=5 k=4

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

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

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

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

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

%Y Column 1 is A000045(n-1).

%Y Column 2 is A297953.

%K nonn,tabl

%O 1,5

%A _R. H. Hardin_, Feb 25 2018

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 24 07:28 EDT 2024. Contains 371922 sequences. (Running on oeis4.)