380928

Appears in sequences

• a(n) = prime(n) * Product_{k=0..n-2} prime(n-k) mod prime(n-k-1).at n=10A037169
• a(n) = 2^(n - 2)*(binomial(n,2) + 2).at n=13A104270
• a(1)= 2. For n > 1, a(n) is the least number k such that k, k - a(n-1) and k + a(n-1) all have n prime divisors counted by multiplicity.at n=13A365852
• a(n) is the determinant of the n-th order Hankel matrix M(n) whose generic element is given by M(i,j) = phi(i+j) with i,j = 0, ..., n-1 and M(0,0) = 0.at n=11A391789