A187270 Number of nonempty subsets of {1, 2, ..., n} with <=9 pairwise coprime elements.

1, 3, 7, 11, 23, 27, 55, 71, 103, 115, 231, 247, 495, 543, 615, 727, 1455, 1519, 3039, 3231, 3615, 3871, 7735, 7991, 11151, 11887, 14631, 15463, 30683, 30939, 60578, 67646, 73813, 77845, 87284, 89054, 171020, 179960, 195265

Offset

1,2

Links

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

Formula

a(n) = A187262(n,9).

Crossrefs

Column 9 of triangle A187262. First differences are A186993.

Sequence in context: A187267 A187268 A187269 * A187271 A187106 A111668

Adjacent sequences: A187267 A187268 A187269 * A187271 A187272 A187273

Keyword

nonn

Author

Alois P. Heinz, Mar 07 2011

Status

approved