64594

Appears in sequences

• a(n) = Sum_{k=0..n} (-1)^(n-k)*binomial(n,k)*2^(2^k).at n=4A000371
• Numbers that appear in A076078.at n=30A097210
• a(n) = the number of sets of distinct positive integers with a least common multiple of A025487(n), i.e., A076078(A025487(n)).at n=21A097211
• Numbers n such that A076078(m)=n for some m, excluding powers of 2.at n=14A097416
• Number of essentially series achiral series-parallel networks with n elements and without multiple unit elements in parallel.at n=20A339291
• Triangle read by rows: T(n,k) = number of collections of up to k subsets of [n] covering [n], with [0]={}; n>=0, k=0..2^n.at n=35A381683