99839

Properties

Appears in sequences

• a(n+3) = 3*a(n+2) - 2*a(n), a(0) = -1, a(1) = 1, a(2) = 3.at n=12A108898
• Least prime p such that sigma(x)=sigma(p) has exactly n solutions.at n=39A115374
• Last prime subtrahend at 10^n in A146757.at n=4A146758
• a(n) = 5*b_5(n)+4, where b_5 lists the indices of zeros of the sequence A261305: u(n) = abs(u(n-1)-gcd(u(n-1),5*n-1)), u(1) = 1.at n=5A186257
• Number of relatively prime Lyndon compositions (aperiodic necklaces of positive integers) with sum n.at n=20A318731
• Prime numbersat n=9580