A187268 Number of nonempty subsets of {1, 2, ..., n} with <=7 pairwise coprime elements.

1, 3, 7, 11, 23, 27, 55, 71, 103, 115, 231, 247, 495, 543, 615, 727, 1447, 1511, 2958, 3148, 3528, 3782, 7226, 7473, 10268, 10969, 13379, 14163, 25751, 25998, 45470, 50309, 55111, 58286, 65586, 67035, 112676, 118867, 129387, 133295

Offset

1,2

Links

Alois P. Heinz, Table of n, a(n) for n = 1..200

Formula

a(n) = A187262(n,7).

Crossrefs

Column 7 of triangle A187262. First differences are A186991.

Sequence in context: A187265 A187266 A187267 * A187269 A187270 A187271

Adjacent sequences: A187265 A187266 A187267 * A187269 A187270 A187271

Keyword

nonn

Author

Alois P. Heinz, Mar 07 2011

Status

approved