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A188256 Number of arrangements of 10 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero 0

%I

%S 0,57808,1657632,20265640,123729664,591604824,2026547348,6250275112,

%T 16132348896,38938013924

%N Number of arrangements of 10 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero

%C Row 8 of A188249

%e Some solutions for n=4

%e .-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4

%e .-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4...-4

%e ..1....1...-2...-1...-1....1...-2...-2...-2....1....1....1...-1...-1....1...-2

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

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

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

%e .-1....4....1...-4...-1....4...-1...-3...-3....1...-1....3...-4...-3...-4....1

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 25 2011

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Last modified June 13 18:45 EDT 2021. Contains 345008 sequences. (Running on oeis4.)