A048093 Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= sqrt(n).

0, 1, 2, 5, 9, 14, 20, 27, 83, 119, 164, 219, 285, 363, 454, 1819, 2379, 3059, 3875, 4844, 5984, 7314, 8854, 10625, 53129, 65779, 80729, 98279, 118754, 142505, 169910, 201375, 237335, 278255, 324631, 1947791, 2324783, 2760680

Offset

1,3

Links

Table of n, a(n) for n=1..38.

Crossrefs

Cf. A084919.

Sequence in context: A134189 A109470 A112873 * A024669 A006482 A191170

Adjacent sequences: A048090 A048091 A048092 * A048094 A048095 A048096

Keyword

nonn

Author

Clark Kimberling

Status

approved