A188004 - OEIS

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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

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