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A223644 T(n,k)=Number of nXk 0..1 arrays with rows, columns, diagonals and antidiagonals unimodal 7

%I #4 Mar 24 2013 17:14:08

%S 2,4,4,7,16,7,11,49,49,11,16,121,218,121,16,22,256,726,726,256,22,29,

%T 484,2014,2962,2014,484,29,37,841,4904,9808,9808,4904,841,37,46,1369,

%U 10797,28450,36947,28450,10797,1369,46,56,2116,21917,74599,120307,120307,74599

%N T(n,k)=Number of nXk 0..1 arrays with rows, columns, diagonals and antidiagonals unimodal

%C Table starts

%C ..2....4.....7.....11......16.......22........29........37.........46

%C ..4...16....49....121.....256......484.......841......1369.......2116

%C ..7...49...218....726....2014.....4904.....10797.....21917......41601

%C .11..121...726...2962....9808....28450.....74599....179991.....404599

%C .16..256..2014...9808...36947...120307....354726....967582....2469396

%C .22..484..4904..28450..120307...428187...1370104...4063584...11337648

%C .29..841.10797..74599..354726..1370104...4682514..14767708...43862845

%C .37.1369.21917.179991..967582..4063584..14767708..49045356..152945545

%C .46.2116.41601.404599.2469396.11337648..43862845.152945545..497721760

%C .56.3136.74635.855417.5941152.29980136.124004457.454159399.1539486460

%H R. H. Hardin, <a href="/A223644/b223644.txt">Table of n, a(n) for n = 1..199</a>

%F Empirical: Columns 1..7 are polynomials of degree 2*k for n > 0,0,0,4,7,13,19

%e Some solutions for n=4 k=4

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

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

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

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

%Y Column 1 is A000124

%Y Column 2 is A086601

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Mar 24 2013

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Last modified April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)