A015663 Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among pairs.

1, 2, 4, 6, 12, 14, 28, 36, 52, 58, 116, 124, 242, 266, 302, 356, 664, 695, 1228, 1311, 1476, 1589, 2667, 2766, 3636, 3898, 4641, 4924, 7665, 7764, 11613, 12678, 13901, 14730, 16540, 16953, 24328, 25688, 27943, 28868

Offset

1,2

Links

Table of n, a(n) for n=1..40.

Crossrefs

Sequence in context: A015632 A111084 A015636 * A352393 A057830 A013916

Adjacent sequences: A015660 A015661 A015662 * A015664 A015665 A015666

Keyword

nonn

Author

Olivier Gérard

Status

approved