The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A208320 Number of nX6 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors 1

%I

%S 122,74164,45806048,28269518640,17447625342768,10768439015566880,

%T 6646136838761770080,4101906889966246046656,2531642149413205778426624,

%U 1562495723122773848862609024,964351492313036003827665859200

%N Number of nX6 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors

%C Column 6 of A208322

%H R. H. Hardin, <a href="/A208320/b208320.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 537*a(n-1) +49592*a(n-2) +31826*a(n-3) -58803472*a(n-4) +179637996*a(n-5) +25002428576*a(n-6) -374089290720*a(n-7) +1673162178864*a(n-8) +1458727001312*a(n-9) -26670663438976*a(n-10) +22320866668800*a(n-11) +163473207070720*a(n-12) -154760782270464*a(n-13) -553868665028608*a(n-14) +195352269029376*a(n-15) +950302465851392*a(n-16) +420741501681664*a(n-17) -139097129615360*a(n-18) -88593968136192*a(n-19) +5745055629312*a(n-20) +4232690270208*a(n-21) for n>22

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 25 2012

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 25 15:17 EST 2022. Contains 350572 sequences. (Running on oeis4.)