A015629 - OEIS

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A015629

Quadruples of different integers from [ 2,n ] with no common factors between triples.

0, 0, 0, 1, 3, 12, 22, 48, 75, 148, 194, 335, 443, 630, 804, 1192, 1401, 1977, 2345, 2980, 3525, 4651, 5222, 6612, 7588, 9117, 10314, 12781, 13879, 16945, 18903, 21845, 24217, 28301, 30496, 35980, 39410, 44481, 48147, 55816, 59277, 68205

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OFFSET

2,5

LINKS

Table of n, a(n) for n=2..43.

CROSSREFS

Sequence in context: A031223 A063598 A063107 * A341374 A154138 A332349

Adjacent sequences: A015626 A015627 A015628 * A015630 A015631 A015632

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved