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A188331 Number of nondecreasing arrangements of n nonzero numbers in -(n+5)..(n+5) with sum zero. 1

%I #7 Apr 30 2022 21:12:59

%S 0,7,32,191,1076,6252,36454,214784,1274786,7621670,45861804,277601505,

%T 1689349524,10331083034,63462615822,391449573689,2423684611456,

%U 15058835953673,93865873942596,586844454182810,3679133098371548

%N Number of nondecreasing arrangements of n nonzero numbers in -(n+5)..(n+5) with sum zero.

%C Column 7 of A188333.

%H R. H. Hardin, <a href="/A188331/b188331.txt">Table of n, a(n) for n = 1..26</a>

%e Some solutions for n=6

%e -10..-10..-11...-4...-4...-5..-10..-11..-11...-6...-6...-7...-7...-5..-11..-10

%e .-6...-1...-8...-4...-4...-5...-6...-5...-5...-4...-2...-5...-6...-5...-8...-9

%e .-3...-1...-5...-4...-3...-2...-6...-2...-1...-2...-2....1...-5...-3...-3....4

%e ..4....4....6....1...-1....1....2....1....4....2...-2....1....3....2....6....5

%e ..5....4....9....4....4....4....9....8....4....3....4....3....7....5....6....5

%e .10....4....9....7....8....7...11....9....9....7....8....7....8....6...10....5

%Y Cf. A188333.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 28 2011

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)