100055

Appears in sequences

• Smallest k such that n times concatenation of k with itself followed by a 7 is a prime, or 0 if no such number exists.at n=29A087605
• Numbers k with property that sum of divisors of k-th triangular number is some m-th triangular number.at n=20A175849
• Integers whose decimal representation consists of three distinct digits, one appearing once, one appearing twice, and one appearing three times.at n=15A182040