login
A015620
Number of triples of different integers from [ 2,n ] with no common factors between pairs.
0
0, 0, 0, 2, 2, 8, 11, 18, 20, 42, 45, 79, 88, 102, 119, 183, 193, 277, 297, 335, 363, 491, 512, 619, 664, 756, 802, 1016, 1037, 1285, 1376, 1494, 1579, 1739, 1790, 2150, 2261, 2431, 2518, 2968, 3022, 3522, 3668, 3848, 4016, 4620, 4721, 5231, 5382
OFFSET
2,4
CROSSREFS
Sequence in context: A202736 A179989 A046982 * A374305 A288053 A288506
KEYWORD
nonn
STATUS
approved