A187269 Number of nonempty subsets of {1, 2, ..., n} with <=8 pairwise coprime elements.

1, 3, 7, 11, 23, 27, 55, 71, 103, 115, 231, 247, 495, 543, 615, 727, 1455, 1519, 3031, 3223, 3607, 3863, 7646, 7901, 10987, 11719, 14393, 15219, 29383, 29638, 55637, 61912, 67681, 71466, 80284, 81965, 149001, 156985, 170628

Offset

1,2

Links

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

Formula

a(n) = A187262(n,8).

Crossrefs

Column 8 of triangle A187262. First differences are A186992.

Sequence in context: A187266 A187267 A187268 * A187270 A187271 A187106

Adjacent sequences: A187266 A187267 A187268 * A187270 A187271 A187272

Keyword

nonn

Author

Alois P. Heinz, Mar 07 2011

Status

approved