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A188234 Number of nondecreasing arrangements of n numbers in -(n+5)..(n+5) with sum zero and not more than two numbers equal 1
1, 8, 40, 234, 1317, 7435, 41748, 234413, 1316060, 7395049, 41601836, 234385104, 1322693568, 7477225191, 42343586740, 240215460615, 1365117760484, 7771029244519, 44310379612078, 253062451888388, 1447507286439975 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A188236

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..25

EXAMPLE

Some solutions for n=4

.-8...-6...-8...-9...-6...-4...-8...-8...-5...-6...-7...-4...-6...-8...-4...-7

..2...-2...-5...-1...-1...-4...-2....0...-3...-5...-4...-2....0...-6...-3...-5

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

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

CROSSREFS

Sequence in context: A272396 A051199 A228679 * A068775 A068774 A073955

Adjacent sequences:  A188231 A188232 A188233 * A188235 A188236 A188237

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 24 2011

STATUS

approved

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Last modified September 19 03:31 EDT 2021. Contains 347550 sequences. (Running on oeis4.)