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A015655 Number of ordered 5-tuples of integers from [ 2,n ] with no common factors among quadruples. 0
0, 2, 7, 32, 56, 156, 266, 498, 750, 1366, 1846, 3037, 4086, 5794, 7615, 11061, 13597, 18938, 23262, 30012, 36537, 47920, 56072, 71259, 84110, 102874, 119889, 148382, 167710, 204747, 234427, 275994, 313632, 370638, 412408, 487120 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..37.

CROSSREFS

Sequence in context: A158940 A102161 A271817 * A320682 A047850 A201373

Adjacent sequences:  A015652 A015653 A015654 * A015656 A015657 A015658

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified February 20 08:44 EST 2019. Contains 320325 sequences. (Running on oeis4.)