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 A243721 Number of length n+2 0..n arrays with no three unequal elements in a row and no three equal elements in a row and new values 0..n introduced in 0..n order 1

%I #5 Jun 09 2014 10:52:45

%S 3,6,12,25,53,116,259,594,1389,3323,8095,20113,50814,130632,341034,

%T 904331,2432412,6636112,18345413,51381635,145691912,418131443,

%U 1213928928,3564262737,10579009345,31733010233,96162631881,294324273852

%N Number of length n+2 0..n arrays with no three unequal elements in a row and no three equal elements in a row and new values 0..n introduced in 0..n order

%C Diagonal of A243729

%H R. H. Hardin, <a href="/A243721/b243721.txt">Table of n, a(n) for n = 1..209</a>

%e Some solutions for n=6

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

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

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

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

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

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

%e ..2....0....0....0....0....1....0....0....0....0....3....1....1....0....2....0

%e ..1....0....0....2....0....0....2....2....1....0....2....1....2....2....3....3

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 09 2014

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Last modified February 24 17:27 EST 2024. Contains 370307 sequences. (Running on oeis4.)