42071

Properties

Appears in sequences

• Primes p such that p and p+2 are twin primes and also the strings 987654321p and 987654321p+2 are twin primes.at n=15A103818
• Prime septets of form k, k+2100, k+4200, k+6300, k+8400, k+10500, k+12600.at n=31A123107
• Primes p such that continued fraction of (1 + sqrt(p))/2 has period 16 : primes in A146339.at n=19A146361
• Cyclops Sophie-Germain primes.at n=30A183058
• Total sum of parts <= n of multiplicity 0 in all partitions of n.at n=17A213679
• Primes of the form n^2 + pi(n).at n=31A228865
• a(n) is the least prime p such that a(n-1) + p is divisible by a(n-2); a(0)=3, a(1)=5.at n=14A338974
• Lesser of twin primes p such that p and p+2 are both in A115591.at n=39A367318
• Prime numbersat n=4399