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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
5020, 11376, 23522, 45225, 81981, 141519, 234413, 374820, 581280, 877662, 1294252, 1868927, 2648493, 3690201, 5063359, 6851134, 9152564, 12084676, 15784822, 20413257, 26155829, 33226923, 41872667, 52374270, 65051638, 80267282, 98430368 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 8 of A188236

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..175

FORMULA

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)

EXAMPLE

Some solutions for n=4

.-7..-10..-10..-10..-10...-9...-9..-10...-9...-8...-9..-10...-9...-7...-8...-6

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

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

.-3....1...-3...-2...-2...-2...-1....1...-1...-1...-1...-2....0...-2...-1...-3

..0....3....4....0...-1....2...-1....2....2....1....0....0....0....2....2....0

..4....3....5....6....6....7....6....6....4....6....5....7....3....2....2....2

..6....6....8....6...10....7....7....7....5....7....5....7....5....5....9....7

..9...10....8....8...10...10....9...10....6....7....9....9...10....8....9...10

CROSSREFS

Sequence in context: A252216 A281299 A112139 * A252162 A248986 A013534

Adjacent sequences:  A188238 A188239 A188240 * A188242 A188243 A188244

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 24 2011

STATUS

approved

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Last modified September 24 12:20 EDT 2020. Contains 337318 sequences. (Running on oeis4.)