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A048083 Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= (n+3)/3. 0
0, 0, 0, 2, 6, 9, 21, 45, 70, 154, 322, 525, 1125, 2325, 3921, 8301, 17061, 29491, 61915, 126763, 223210, 465746, 950818, 1698453, 3527109, 7184421, 12981421, 26855641, 54604081, 99589963, 205390163, 416990563, 766466053, 1576646941 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
CROSSREFS
Sequence in context: A337639 A047161 A318193 * A127931 A346673 A077237
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 15 18:28 EDT 2024. Contains 371696 sequences. (Running on oeis4.)