61979

Properties

Appears in sequences

• Prime(prime(n)) when prime(prime(n)) and n are twin primes.at n=25A087394
• Lower twin primes with lower twin prime index.at n=32A088460
• Primes with nine embedded primes.at n=30A179917
• Prime p such that p and p+2 are twin primes and p^2+p-1 p^2+p+1 are also twin primes.at n=17A228968
• Smallest lesser of twin primes (A001359) with index n, or a(n)=0, if there are no such twin primes.at n=35A242807
• Number of (n+2)X(7+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=11A259005
• Integers n such that n+2!, n+2!+3!, n+2!+3!+4!, n+2!+3!+4!+5!, n+2!+3!+4!+5!+6!, and n+2!+3!+4!+5!+6!+7! are all prime.at n=26A267123
• Numbers that are the smallest of four consecutive primes, no three of which sum to a nonprime.at n=18A298763
• Prime numbersat n=6229