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A015698 Number of 5-tuples of different integers from [ 1,n ] with no common factors among pairs. 2
0, 0, 0, 0, 0, 0, 2, 3, 6, 6, 32, 33, 105, 114, 128, 157, 385, 400, 831, 886, 1001, 1076, 2004, 2074, 2817, 3022, 3655, 3880, 6379, 6449, 10020, 10978, 12063, 12791, 14417, 14767, 21746, 22977, 25038, 25860, 36660, 37110, 51088, 53449, 56199 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..45.

CROSSREFS

Column 5 of triangle A186974. Partial sums of A186976.

Sequence in context: A057545 A015628 A060692 * A068587 A218954 A182560

Adjacent sequences:  A015695 A015696 A015697 * A015699 A015700 A015701

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified October 22 18:55 EDT 2018. Contains 316500 sequences. (Running on oeis4.)