23813

Properties

Appears in sequences

• [ (4th elementary symmetric function of S(n))/(2nd elementary symmetric of S(n)) ], where S(n) = {3,4, ..., n+5}.at n=28A024194
• Prime(n) and prime(n+3) use the same digits.at n=27A069795
• Primes of the form 6n^2 - 1.at n=25A090686
• Primes p equal to the sum of two successive sexy primes + 1 such that p + 6 is also prime.at n=32A104043
• a(n) = 54*n^2 - 1.at n=20A158656
• Engel expansion of sqrt(7).at n=21A161368
• Primes of the form 5n^2 + 8.at n=12A201486
• Primes p such that A001175(p) = 2*(p+1)/9.at n=18A308786
• Least number k that reaches 1 after n iterations of A071324.at n=31A333265
• Primes p such that Euler(p, 1) is an integer multiple of Bernoulli(p + 1, 1).at n=18A341759
• A sequence of integers from an additive problem with prime numbers.at n=26A348472
• a(n) = Sum_{k=0..floor(n/3)} 2^k * binomial(2*n-4*k+1,2*k).at n=12A387625
• Prime numbersat n=2648