105609

Appears in sequences

• a(n) = (10n+1)*(10n+9).at n=32A001535
• Numbers k such that the decimal part of k^(1/10) starts with a 'nine digits' anagram.at n=33A034285
• Numbers k such that (7*10^(2k+1) - 18*10^k - 7)/9 is prime.at n=16A183180