100000032

Appears in sequences

• Smallest positive integer with n digits and exactly n prime factors (counted with multiplicity).at n=8A036336
• a(1) = 1, a(2) = 21; for n>2, a(n) is the least number whose neighboring digit difference forms a(n-1) such that a(n+1) also exists.at n=8A110400
• Least multiple of n in which the n-th digit from left is 3.at n=7A113558