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

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

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