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A231263 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order 14

%I #4 Nov 06 2013 07:58:01

%S 2,3,6,4,15,22,7,32,89,86,12,83,304,547,342,23,211,1253,2982,3381,

%T 1366,44,557,5109,19503,29366,20911,5462,87,1471,21894,126851,302121,

%U 289230,129329,21846,172,3909,94234,866396,3130708,4670875,2848550,799835,87382

%N T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order

%C Table starts

%C ......2........3..........4............7.............12...............23

%C ......6.......15.........32...........83............211..............557

%C .....22.......89........304.........1253...........5109............21894

%C .....86......547.......2982........19503.........126851...........866396

%C ....342.....3381......29366.......302121........3130708.........34170727

%C ...1366....20911.....289230......4670875.......77333664.......1350570015

%C ...5462...129329....2848550.....72212345.....1911322499......53369789699

%C ..21846...799835...28054534...1116538567....47238533054....2108712981800

%C ..87382..4946509..276301638..17264116873..1167469879103...83318930054700

%C .349526.30591143.2721223974.266940042371.28853204049176.3292096503338981

%H R. H. Hardin, <a href="/A231263/b231263.txt">Table of n, a(n) for n = 1..161</a>

%F Empirical for column k:

%F k=1: a(n) = 5*a(n-1) -4*a(n-2)

%F k=2: a(n) = 10*a(n-1) -29*a(n-2) +36*a(n-3) -16*a(n-4)

%F k=3: [order 7]

%F k=4: [order 12]

%F k=5: [order 32]

%F k=6: [order 67] for n>68

%F Empirical for row n:

%F n=1: a(n) = 2*a(n-1) +a(n-2) -2*a(n-3)

%F n=2: [order 9]

%F n=3: [order 27] for n>28

%e Some solutions for n=3 k=4

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

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

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

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

%Y Column 1 is A047849

%Y Row 1 is A023105(n+1)

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Nov 06 2013

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Last modified April 27 09:38 EDT 2024. Contains 372017 sequences. (Running on oeis4.)