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A232871 Number of (n+1)X(1+1) 0..1 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..1+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing 2

%I #5 Dec 01 2013 17:17:52

%S 7,14,25,39,57,81,112,151,195,247,309,382,467,558,661,778,910,1054,

%T 1211,1384,1574,1783,2006,2246,2506,2787,3090,3408,3748,4112,4501,

%U 4915,5349,5807,6293,6808,7352,7918,8513,9139,9798,10489,11204,11951,12733,13551

%N Number of (n+1)X(1+1) 0..1 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..1+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing

%C Column 1 of A232877

%H R. H. Hardin, <a href="/A232871/b232871.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 01 2013

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Last modified April 25 04:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)