15724800

Appears in sequences

• Smallest j associated with a(n) in A103277.at n=7A103278
• A triangular sequence based on a further generalization of the Cornelius-Schultz matrix polynomials to two sequences in i and j. a(n)=(n-1)!/f[n]: f[n]-> Fibonacci numbers; c(n)=1/n; B(i,j)=(-1)^(i + j)*a[j + 1]*c[i + 1]/(j!*(i - j)!) as a lower triangular matrix.at n=21A135256
• a(n) is the least number such that there are n semiprimes pq such that (p+1)(q+1) = a(n) for each semiprime.at n=31A180334
• Numbers other than prime powers divisible by the sum, the sum of squares and the sum of cubes of their prime divisors.at n=1A268418
• a(n) is the smallest k such that k = x_11 * x_12 * x_13 = x_21 * x_22 * x_23 = ... = x_n1 *x_n2 * x_n3 and x_11 + x_12 + x_13 = x_21 + x_22 + x_23 = ... = x_n1 + x_n2 + x_n3; x_ij >= 2.at n=7A339469
• a(n) = n! * Prod_{k=1..n} Fibonacci(k).at n=7A385630