117721

Properties

Appears in sequences

• Primes with 22 as smallest positive primitive root.at n=28A061334
• Primes p such that denominator of Sum_{k=1..p-1} 1/k^2 is a square and denominator Sum_{k=1..p-1} 1/k^3 is a cube and denominator Sum_{k=1..p-1} 1/k^4 is a fourth power.at n=32A127062
• Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting four doublets into the initially empty word.at n=21A194716
• Minimal number (in decimal representation) with n nonprime substrings in base-7 representation (substrings with leading zeros are considered to be nonprime).at n=23A217107
• Centered 20-gonal (or icosagonal) primes.at n=27A264845
• The set S of primes q satisfying certain conditions (see Müller, 2010 for precise definition).at n=16A275739
• Expansion of Sum_{k>=1} x^k * (1 + k * x^k)^k.at n=35A327249
• Numbers p such that p, 2p-1, 3p-2, 4p-3 are primes.at n=30A336059
• Prime numbersat n=11106