A015627 Quadruples of different integers from [ 2,n ] with no global factor.

0, 0, 0, 1, 5, 15, 34, 69, 121, 205, 314, 479, 679, 961, 1290, 1745, 2239, 2919, 3650, 4599, 5619, 6949, 8290, 10057, 11861, 14105, 16418, 19343, 22165, 25819, 29424, 33799, 38199, 43631, 48780, 55325, 61649, 69199, 76632, 85771, 94235, 104895

Offset

2,5

Links

Table of n, a(n) for n=2..43.

Crossrefs

Sequence in context: A111385 A084288 A083049 * A156778 A346752 A292955

Adjacent sequences: A015624 A015625 A015626 * A015628 A015629 A015630

Keyword

nonn

Author

Olivier Gérard

Status

approved