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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

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