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!)
A282312 Number of nX4 0..1 arrays with no 1 equal to more than four of its king-move neighbors. 1

%I

%S 16,249,2968,40024,535494,7114808,94872444,1264480188,16850046438,

%T 224565308124,2992779108636,39884536962920,531540331101698,

%U 7083819489765624,94405806029540190,1258142932156210156

%N Number of nX4 0..1 arrays with no 1 equal to more than four of its king-move neighbors.

%C Column 4 of A282316.

%H R. H. Hardin, <a href="/A282312/b282312.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 9*a(n-1) +43*a(n-2) +233*a(n-3) -369*a(n-4) -1432*a(n-5) -4530*a(n-6) +2472*a(n-7) +11204*a(n-8) +21774*a(n-9) -142*a(n-10) -13268*a(n-11) -20778*a(n-12) -1758*a(n-13) +3980*a(n-14) +5134*a(n-15) +500*a(n-16) +68*a(n-17) +72*a(n-18)

%e Some solutions for n=4

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

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

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

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

%Y Cf. A282316.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 11 2017

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 March 26 09:21 EDT 2023. Contains 361529 sequences. (Running on oeis4.)