39863

Properties

Appears in sequences

• Lesser of pseudo twin primes to base 2.at n=25A192297
• a(1) = greatest k such that H(k) - H(4) < 1/3 + 1/4; a(2) = greatest k such that H(k) - H(a(1)) < H(a(1)) - H(4); and for n > 2, a(n) = greatest k such that H(k) - H(a(n-1)) > H(a(n-1)) - H(a(n-2)), where H = harmonic number.at n=22A224868
• Prime numbersat n=4191