22429

Appears in sequences

• Number of ways to cover (without overlapping) a ring lattice (necklace) of n sites with molecules that are 8 sites wide.at n=47A058365
• Products (semiprimes) of two distinct double-safe primes.at n=12A157356
• Number of (5+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=34A250659
• Consider a number x. Take the sum of its digits. Repeat the process deleting the first addendum and adding the previous sum. The sequence lists the numbers that after some iterations reach the arithmetic derivative of x.at n=24A269312
• One-third of the number of simple intersection points in the interior of the n-th triangle described in A092867 and A366479.at n=14A366480