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 A235779 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise 3

%I #4 Jan 15 2014 12:45:40

%S 256,2612,2612,23024,68942,23024,180640,1581879,1581879,180640,

%T 1321956,30969609,101237218,30969609,1321956,9182760,545929374,

%U 5639406769,5639406769,545929374,9182760,61590128,8741113000,284827103857

%N T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise

%C Table starts

%C ......256.......2612........23024.......180640......1321956........9182760

%C .....2612......68942......1581879.....30969609....545929374.....8741113000

%C ....23024....1581879....101237218...5639406769.284827103857.12969746978427

%C ...180640...30969609...5639406769.960684617696

%C ..1321956..545929374.284827103857

%C ..9182760.8741113000

%C .61590128

%H R. H. Hardin, <a href="/A235779/b235779.txt">Table of n, a(n) for n = 1..31</a>

%e Some solutions for n=2 k=4

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

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

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

%Y Column 1 is A235556

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Jan 15 2014

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Last modified May 22 13:22 EDT 2024. Contains 372755 sequences. (Running on oeis4.)