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A188275 Number of nondecreasing strings of numbers x(i=1..n) in -7..7 with sum x(i)^3 equal to 0 1
1, 8, 8, 38, 42, 148, 202, 552, 890, 2020, 3566, 7176, 12928, 24098, 42656, 75315, 129065, 218078, 360564, 586492, 937076, 1474258, 2283944, 3489536, 5260144, 7831600, 11522100, 16764968, 24136482, 34405442, 48581032, 67985823, 94334343 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 7 of A188277
LINKS
EXAMPLE
Some solutions for n=8 k=7
.-5...-6...-4...-7...-5...-5...-4...-7...-7...-3...-3...-7...-3...-5...-6...-5
.-4...-5...-3...-5...-2...-5...-1...-3...-5...-1...-3...-6...-3...-5...-6...-4
.-4...-3...-3...-1...-1...-5....1...-3...-5....0...-1...-3...-3...-4...-6...-4
.-3...-3...-2....0....2...-4....1...-2...-4....0....0....0...-3...-4...-3...-1
..3....3....2....4....2...-1....1...-1...-3....0....0....0...-2....0....3....1
..4....3....3....4....3....2....2...-1....5....0....1....3...-2....2....6....4
..4....5....3....5....3....6....3....4....6....1....3....6...-1....3....6....4
..5....6....4....6....4....6....3....7....7....3....3....7....5....7....6....5
CROSSREFS
Sequence in context: A111218 A339340 A341247 * A319019 A278846 A339323
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 26 2011
STATUS
approved

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Last modified June 19 10:37 EDT 2024. Contains 373501 sequences. (Running on oeis4.)