A048027 Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n-3)/3.

0, 0, 0, 0, 0, 5, 6, 7, 35, 44, 54, 219, 285, 363, 1364, 1819, 2379, 8567, 11627, 15503, 54263, 74612, 100946, 346103, 480699, 657799, 2220074, 3108104, 4292144, 14307149, 20160074, 28048799, 92561039, 131128139, 183579395

Offset

1,6

Links

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

Crossrefs

Sequence in context: A066876 A048042 A048090 * A294071 A240661 A153430

Adjacent sequences: A048024 A048025 A048026 * A048028 A048029 A048030

Keyword

nonn

Author

Clark Kimberling

Status

approved