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A198657 Number of nX3 0..7 arrays with values 0..7 introduced in row major order and each element equal to at least one horizontal or vertical neighbor 1

%I #5 Mar 31 2012 12:36:34

%S 1,14,185,3904,98467,3053286,109133049,4460603630,202661109307,

%T 10057569576034,533251017131222,29684104738808241,1708995821028336330,

%U 100671800330158890680,6020806089426293935506,363687165160204642974491

%N Number of nX3 0..7 arrays with values 0..7 introduced in row major order and each element equal to at least one horizontal or vertical neighbor

%C Column 3 of A198661

%H R. H. Hardin, <a href="/A198657/b198657.txt">Table of n, a(n) for n = 1..138</a>

%e Some solutions with all values 0 to 7 for n=6

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

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

%e ..3..4..5....3..3..4....3..3..2....3..3..4....3..3..4....0..2..3....3..3..2

%e ..3..4..5....5..3..4....4..5..6....5..5..4....5..5..4....4..5..5....4..4..5

%e ..6..6..0....5..6..7....4..5..6....6..6..6....6..6..4....4..6..6....6..5..5

%e ..7..7..0....6..6..7....4..7..7....7..7..6....7..7..7....7..7..6....6..7..7

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 28 2011

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Last modified March 29 09:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)