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A188004 Number of nondecreasing arrangements of 4 numbers x(i) in -(n+2)..(n+2) with the sum of sign(x(i))*x(i)^2 zero 1
12, 17, 25, 34, 46, 57, 75, 88, 108, 125, 147, 170, 196, 217, 249, 280, 316, 345, 387, 422, 466, 501, 545, 588, 644, 687, 743, 792, 850, 901, 973, 1034, 1100, 1157, 1227, 1294, 1374, 1435, 1519, 1594, 1682, 1757, 1847, 1930, 2026, 2103, 2205, 2294, 2404, 2491 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A188002

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..199

EXAMPLE

Some solutions for n=3

..0...-5...-2...-4...-3...-5...-4...-2...-3...-5...-5...-4...-2...-5...-5...-4

..0...-2...-2...-4....0...-5...-2....0....1...-4...-1....0...-2....0....0...-1

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

..0....5....3....4....3....5....4....2....2....5....5....4....2....5....4....4

CROSSREFS

Sequence in context: A336890 A302359 A214514 * A045699 A155096 A166674

Adjacent sequences:  A188001 A188002 A188003 * A188005 A188006 A188007

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 18 2011

STATUS

approved

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Last modified August 9 16:39 EDT 2022. Contains 356026 sequences. (Running on oeis4.)