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Number of arrangements of 3 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero
1

%I #5 Mar 31 2012 12:36:15

%S 4,12,38,78,148,240,380,554,788,1062,1410,1806,2294,2844,3498,4226,

%T 5068,5988,7040,8180,9466,10850,12396,14046,15876,17824,19960,22226,

%U 24696,27296,30118,33090,36288,39642,43242,47002,51022,55220,59690,64346,69294

%N Number of arrangements of 3 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero

%C Row 2 of A189498

%H R. H. Hardin, <a href="/A189499/b189499.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for n=5

%e ..4...-1....3...-4....1...-1...-3....2....4....5....3...-5....4....3....1...-3

%e .-5....5...-5...-3....2...-4....5....2....3....4...-5...-3...-5....3...-5....4

%e .-5....3...-3....3....5...-5....5...-5...-3...-4...-4....4...-4...-4...-4....4

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 23 2011