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A015622 Quadruples of different integers from [ 1,n ] with no global factor. 0
0, 0, 0, 1, 5, 15, 35, 69, 125, 205, 325, 479, 699, 965, 1325, 1745, 2305, 2919, 3735, 4619, 5739, 6949, 8489, 10061, 12081, 14161, 16705, 19343, 22619, 25819, 29879, 33919, 38759, 43655, 49615, 55325, 62465, 69419, 77635, 85771, 95651, 104895 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..42.

CROSSREFS

Sequence in context: A063382 A069983 A005894 * A292103 A290447 A000750

Adjacent sequences:  A015619 A015620 A015621 * A015623 A015624 A015625

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified October 17 03:15 EDT 2018. Contains 316275 sequences. (Running on oeis4.)