91111

Appears in sequences

• a(0) = 0; for n>0, a(n) is the smallest number greater than a(n-1) which does not use any digit used by a(n-1).at n=43A030283
• Numbers with multiplicative digital root value 9.at n=34A034056
• Lexicographically earliest increasing sequence of composite numbers such that the digits of a(n) do not appear in a(n-1).at n=37A100373
• Near-repunit semiprimes.at n=36A105993
• Lexicographically earliest increasing sequence of numbers with all odd digits alternating with numbers with all even digits.at n=40A180412
• Composite numbers whose multiplicative digital root is 9.at n=28A201024
• Expansion of Product_{k>=1} 1/(1 + prime(k)*x^k).at n=16A305881