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A188241 Number of nondecreasing arrangements of 8 numbers in -(n+6)..(n+6) with sum zero and not more than two numbers equal 1

%I

%S 5020,11376,23522,45225,81981,141519,234413,374820,581280,877662,

%T 1294252,1868927,2648493,3690201,5063359,6851134,9152564,12084676,

%U 15784822,20413257,26155829,33226923,41872667,52374270,65051638,80267282,98430368

%N Number of nondecreasing arrangements of 8 numbers in -(n+6)..(n+6) with sum zero and not more than two numbers equal

%C Row 8 of A188236

%H R. H. Hardin, <a href="/A188241/b188241.txt">Table of n, a(n) for n = 1..175</a>

%F Empirical: a(n)=3*a(n-1)-2*a(n-2)-3*a(n-4)+4*a(n-5)-3*a(n-8)+3*a(n-9)-a(n-11)-a(n-12)+3*a(n-14)-3*a(n-15)+4*a(n-18)-3*a(n-19)-2*a(n-21)+3*a(n-22)-a(n-23)

%e Some solutions for n=4

%e .-7..-10..-10..-10..-10...-9...-9..-10...-9...-8...-9..-10...-9...-7...-8...-6

%e .-6..-10...-7...-5..-10...-8...-8..-10...-6...-8...-5...-6...-8...-4...-8...-5

%e .-3...-3...-5...-3...-3...-7...-3...-6...-1...-4...-4...-5...-1...-4...-5...-5

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

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

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

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

%e ..9...10....8....8...10...10....9...10....6....7....9....9...10....8....9...10

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 24 2011

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Last modified October 26 11:29 EDT 2020. Contains 338027 sequences. (Running on oeis4.)