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A015663 Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among pairs. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

CROSSREFS

Sequence in context: A015632 A111084 A015636 * A057830 A013916 A141113

Adjacent sequences:  A015660 A015661 A015662 * A015664 A015665 A015666

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified August 4 16:34 EDT 2020. Contains 336202 sequences. (Running on oeis4.)