190035
domain: N
Appears in sequences
- Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-1)/3.at n=38A048013
- Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-2)/3.at n=38A048024
- Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-3)/3.at n=38A048035
- Numbers n such that phi(reverse(n)) = sigma(n).at n=23A070835