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A048091 Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n+3)/3. 0
0, 0, 0, 0, 0, 0, 0, 3, 4, 24, 84, 105, 280, 630, 756, 1527, 2937, 3465, 6930, 15015, 18304, 44044, 108164, 135219, 328944, 767244, 953360, 2152710, 4738410, 5848238, 12890614, 28583709, 35471919, 80628669, 184657869 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Table of n, a(n) for n=1..35.

O. Bagdasar, On some functions involving the lcm and gcd of integer tuples, Scientific Publications of the State University of Novi Pazar, Appl. Maths. Inform. and Mech., Vol. 6, 2 (2014), 91--100.

CROSSREFS

Sequence in context: A050801 A103093 A124632 * A189738 A256830 A065900

Adjacent sequences:  A048088 A048089 A048090 * A048092 A048093 A048094

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified August 4 00:29 EDT 2021. Contains 346441 sequences. (Running on oeis4.)