1645312

Appears in sequences

• Number of degree-2n permutations such that number of cycles of size 2k-1 is even (or zero) for every k.at n=5A130276
• a(n) is the smallest integer k such that Omega(k) = n and Omega(2*k+1) = n+1 (where Omega is A001222).at n=8A330089