3928669

Properties

Appears in sequences

• a(n) = 10*b_10(n) + 9, where b_10 lists the indices of zeros of the sequence A261310: u(n) = abs(u(n-1) - gcd(u(n-1), 10n-1)), u(1) = 1.at n=5A186263
• Prime numbersat n=278499