A048034 Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= (n-3)/3.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 36, 45, 55, 220, 264, 312, 780, 910, 1050, 3465, 4220, 5100, 21420, 26775, 33117, 118104, 146300, 179340, 574644, 708477, 866019, 2899380, 3610540, 4463500, 15634300, 19623175, 24446565, 83635695

Offset

1,12

Links

Table of n, a(n) for n=1..39.

Crossrefs

Sequence in context: A062034 A250641 A168107 * A195528 A144291 A068143

Adjacent sequences: A048031 A048032 A048033 * A048035 A048036 A048037

Keyword

nonn

Author

Clark Kimberling

Status

approved