22118400

Appears in sequences

• Smallest k-almost prime between twin primes (for k >= 2).at n=18A068525
• Multiply a(n) by the first digit of a(n+1) to get a(n+2). The sequence starts with a(1) = 1 and a(2) = 2.at n=34A300759
• Smaller of two successive terms of A025487 that have an equal number of divisors.at n=15A375196
• Numbers m of the form 2^i * 3^j * 5^k such that i, j, k > 0 and m+1 and m-1 are both prime numbers.at n=31A386252
• Integers k such that A008472(k) / A001222(k) = 1/2.at n=29A390139