160083

Appears in sequences

• Successive denominators of Wallis's approximation to Pi/2 (reduced).at n=11A001902
• Denominators of the column sums of the BG2 matrix.at n=5A161736
• Least term of A094179 with exactly 2n divisors.at n=17A204046
• Denominator of 2n/v(n)^2, where v(1) = 0, v(2) = 1, and v(n) = v(n-1)/(n-2) + v(n-2) for n >= 3. (Limit of 2n/v(n)^2 is Pi.)at n=11A239225
• Number of length n+1 0..2 arrays with at most one downstep in every n consecutive neighbor pairs.at n=24A255108
• Number of chordless cycles in the complete tripartite graph K_{n,n,n}.at n=21A297662
• Largest number of maximum matchings in a tree of n vertices.at n=37A333347
• a(n) = numerator(r(n)) where r(n) = (n/2)*(Pi/2)^cos(Pi*(n-1))*((n/2-1/2)!/(n/2)!)^2.at n=12A380949