290400

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= n/2.at n=22A047167
• Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= (n-1)/2.at n=22A047178
• Numbers k such that k = phi(sigma(phi(sigma(phi(sigma(k)))))).at n=24A067884
• Number of non-attacking placements of 3 rooks on an n X n board.at n=11A179058
• Number of minimum total dominating sets in the n X n rook complement graph.at n=11A303212
• Numbers k such that 6*k + 1 is a prime that can be written as p*q + 2, with p and q being consecutive primes.at n=28A342564