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A187266 Number of nonempty subsets of {1, 2, ..., n} with <=5 pairwise coprime elements. 2
1, 3, 7, 11, 23, 27, 55, 71, 103, 115, 225, 241, 450, 496, 565, 663, 1170, 1227, 2055, 2196, 2473, 2666, 4257, 4420, 5709, 6122, 7223, 7664, 11449, 11612, 16776, 18255, 19991, 21178, 23718, 24327, 33888, 35767, 38853, 40157, 54455 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
a(n) = A187262(n,5).
CROSSREFS
Column 5 of triangle A187262. First differences are A186989.
Sequence in context: A137516 A247380 A187265 * A187267 A187268 A187269
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Mar 07 2011
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)