A015655 - OEIS

A015655

Number of ordered 5-tuples of integers from [ 2,n ] with no common factors among quadruples.

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

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OFFSET

2,2

LINKS

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

CROSSREFS

Sequence in context: A158940 A102161 A271817 * A320682 A344130 A327214

Adjacent sequences: A015652 A015653 A015654 * A015656 A015657 A015658

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved