64473

Appears in sequences

• a(1) = 6, a(n) = smallest number of the form k*a(n-1) +1 with the same prime signature p*q (6 = 2*3), where p and q are primes.at n=9A085066
• a(1) = 6, a(n) = smallest number of the form k*a(n-1) + 1 with the same number of divisors, i.e., 4.at n=9A085067
• Number of n X 4 arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random 0..2 n X 4 array.at n=5A217543
• Number of nX6 arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random 0..2 nX6 array.at n=3A217545
• T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random 0..2 nXk array.at n=39A217547
• T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random 0..2 nXk array.at n=41A217547
• Number of rooted identity trees with n nodes and exactly 8 subtrees from the root.at n=7A227812
• a(n) = 63*2^n - 39 (n>=1).at n=9A304509