228881

Properties

Appears in sequences

• a(1) = 1, a(2) = 2 and a(n) = smallest number not included earlier that divides the concatenation a(n-2), a(n-1).at n=21A085946
• Smallest prime whose product of digits is an n-th power.at n=10A089364
• Smallest prime whose product of digits is 2^n.at n=11A089365
• Lesser of twin primes such that both twin primes have no bases b, 1 < b < p-1, in which p is a palindrome.at n=26A138348
• Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,4,1,3 for x=0,1,2,3,4.at n=8A196310
• Prime numbersat n=20337