267894

Appears in sequences

• a(n) is the least k such that k*Mersenne_prime(n) - 1 and k*Mersenne_prime(n) + 1 are twin primes.at n=13A098814
• Let M(n) = maximal value of (n/k)^k over all k = 1, 2, ...; a(n) = round(M(n)).at n=33A139077
• Let M(n) = maximal value of (n/k)^k over all k = 1, 2, ...; a(n) = ceiling(M(n)).at n=33A139078
• Maximal entry in row n of triangle in A169940.at n=20A169944