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A048080 Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n+2)/3. 1
0, 0, 0, 0, 0, 0, 0, 3, 18, 24, 84, 224, 280, 630, 1270, 1527, 2937, 5742, 6930, 15015, 35035, 44044, 108164, 260064, 328944, 767244, 1720944, 2152710, 4738410, 10329750, 12890614, 28583709, 64071194, 80628669, 184657869 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,8
LINKS
CROSSREFS
Sequence in context: A131860 A346421 A263578 * A306279 A169598 A202359
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 22 02:54 EDT 2024. Contains 371887 sequences. (Running on oeis4.)