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A188210 Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero 1

%I

%S 1,9,50,318,1944,11963,73316,450096,2767118,17052653,105356398,

%T 652694106,4054512228,25254176312,157709971144,987358943331,

%U 6196330627807,38975339759358,245693231541360,1552021349807456,9823321416340666

%N Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero

%C Column 8 of A188211

%H R. H. Hardin, <a href="/A188210/b188210.txt">Table of n, a(n) for n = 1..25</a>

%e Some solutions for n=3

%e .-3...-7...-4...-5...-2...-4...-5...-9...-8...-9...-6...-3...-4...-7...-3...-6

%e .-3....0...-3...-2...-2....1...-4....2....1....3....2...-1...-1....1....1....1

%e ..6....7....7....7....4....3....9....7....7....6....4....4....5....6....2....5

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 24 2011

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Last modified March 26 12:43 EDT 2019. Contains 321497 sequences. (Running on oeis4.)