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A210785 Number of nX5 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z 1

%I #5 Mar 31 2012 12:37:34

%S 497,40038,748627,8039420,98861559,1663213556,37591420090,

%T 889827826226,19000146172584,357119485379094,6660333940592922,

%U 127334484690637704,2571728358748562057,51856792367440537602,1045305735218927674440

%N Number of nX5 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z

%C Column 5 of A210788

%H R. H. Hardin, <a href="/A210785/b210785.txt">Table of n, a(n) for n = 1..18</a>

%e Some solutions for n=4

%e ..2..1..3..3..2....3..3..3..4..4....2..1..3..1..3....3..4..3..1..4

%e ..1..4..3..1..2....1..3..4..1..4....4..3..4..2..1....4..1..4..3..1

%e ..4..4..4..4..1....4..1..2..4..1....3..4..3..1..4....1..4..2..1..3

%e ..1..2..2..1..3....1..4..1..3..2....1..3..1..3..1....2..3..1..3..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 26 2012

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Last modified February 27 04:33 EST 2024. Contains 370362 sequences. (Running on oeis4.)