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A224038 T(n,k)=Number of nXk 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing 12

%I #4 Mar 30 2013 10:46:23

%S 2,3,4,4,8,8,5,13,21,16,6,19,37,55,32,7,26,58,105,144,64,8,34,85,168,

%T 298,377,128,9,43,119,252,488,848,987,256,10,53,161,363,734,1422,2419,

%U 2584,512,11,64,212,508,1064,2149,4160,6908,6765,1024,12,76,273,695,1505,3107

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

%C Table starts

%C ....2.....3.....4......5......6......7......8......9.....10.....11......12

%C ....4.....8....13.....19.....26.....34.....43.....53.....64.....76......89

%C ....8....21....37.....58.....85....119....161....212....273....345.....429

%C ...16....55...105....168....252....363....508....695....933...1232....1603

%C ...32...144...298....488....734...1064...1505...2091...2864...3875....5185

%C ...64...377...848...1422...2149...3107...4395...6124...8439..11527...15626

%C ..128...987..2419...4160...6321...9125..12856..17875..24623..33686...45837

%C ..256..2584..6908..12214..18673..26928..37808..52356..71923..98238..133616

%C ..512..6765.19737..35960..55373..79800.111683.154076.210890.287271..389967

%C .1024.17711.56401.106072.164729.237348.331170.455195.620860.843084.1141689

%H R. H. Hardin, <a href="/A224038/b224038.txt">Table of n, a(n) for n = 1..1012</a>

%F Empirical: columns k=1..7 have recurrences of order 1,2,5,7,9,11,13 for n>0,0,0,10,13,16

%F Empirical: rows n=1..7 are polynomials of degree n for k>0,0,1,2,3,4,5

%e Some solutions for n=3 k=4

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

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

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

%Y Column 1 is A000079

%Y Column 2 is A001906(n+1)

%Y Row 1 is A000027(n+1)

%Y Row 2 is A034856(n+1)

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Mar 30 2013

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Last modified September 2 22:46 EDT 2024. Contains 375620 sequences. (Running on oeis4.)