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A183932 Number of nondecreasing arrangements of n numbers in -6..6 with sum zero and sum of squares less than n*42/3. 1

%I #7 Apr 26 2021 21:10:44

%S 1,4,15,56,157,421,1030,2349,5033,10278,20065,37609,68129,119718,

%T 204358,340240,553695,882178,1378928,2117950,3199767,4762105,6989141,

%U 10123604,14486392,20495431,28686822,39751213,54565631,74232787,100141371

%N Number of nondecreasing arrangements of n numbers in -6..6 with sum zero and sum of squares less than n*42/3.

%C Column 6 of A183935.

%H R. H. Hardin, <a href="/A183932/b183932.txt">Table of n, a(n) for n = 1..71</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A183935.

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 08 2011

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Last modified April 19 10:56 EDT 2024. Contains 371791 sequences. (Running on oeis4.)