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A222881 Number of 4Xn 0..3 arrays with no more than floor(4Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1

%I #4 Mar 08 2013 07:43:01

%S 15,2150,443510,95867967,20978414941,4643150795564,1036481888251762,

%T 232912437941917635,52614561200004212957,11936312777288007185980,

%U 2717468404561524996790251,620503805193057253513443782

%N Number of 4Xn 0..3 arrays with no more than floor(4Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Row 4 of A222878

%H R. H. Hardin, <a href="/A222881/b222881.txt">Table of n, a(n) for n = 1..16</a>

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 08 2013

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Last modified March 28 16:34 EDT 2024. Contains 371254 sequences. (Running on oeis4.)