A015629 - OEIS

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A015629

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

0

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