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A015640 Number of 5-tuples of different integers from [ 1,n ] with no global factor. 0
0, 0, 0, 0, 1, 6, 21, 56, 126, 251, 461, 786, 1281, 1981, 2981, 4311, 6131, 8436, 11496, 15246, 20076, 25851, 33166, 41656, 52281, 64436, 79316, 96151, 116626, 139246, 166651, 196751, 232501, 271601, 317961, 367616, 426521, 489506 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..38.

CROSSREFS

Sequence in context: A282845 A050190 A008498 * A138780 A108907 A306940

Adjacent sequences:  A015637 A015638 A015639 * A015641 A015642 A015643

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified November 19 16:37 EST 2019. Contains 329323 sequences. (Running on oeis4.)