23593

Properties

Appears in sequences

• Primes of form prime(1) + ... + prime(k) + 1.at n=14A053845
• Initial term in sequence of four consecutive primes whose consecutive differences have d-pattern = [6, 4, 6]; short d-string notation for pattern = [646].at n=29A078856
• Smallest squarefree integer k such that Q(sqrt(k)) has class number n.at n=22A081363
• Smallest d such that real quadratic field with discriminant d has class number n.at n=22A081364
• Primes that are a concatenation of 2, 3 and a prime.at n=20A101218
• Integers n such that n is prime and x is prime, where (x,y) is the smallest solution to the Pell equation with D = n.at n=19A109748
• Home primes whose homeliness is 4.at n=28A133962
• Primes p such that continued fraction of (1 + sqrt(p))/2 has period 3.at n=46A146348
• Primes with a prime number of partitions into prime parts.at n=29A146949
• Primes of the form 25n^2-14n+2 for n >= 0.at n=9A154356
• a(n) = 25*n^2 - 14*n + 2.at n=31A154357
• Primes of the form Sum_{k=1..m} (m^k mod (m-k+1)).at n=42A156559
• Primes with eight embedded primes.at n=18A179916
• Half the number of n X 3 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors.at n=12A183304
• Primes p such that the period of the continued fraction of (1-sqrt(p))/2 has length 3 and p is not of the form k^2+1.at n=20A188136
• a(n) = (n*4^(n+1) + (6*4^(n+1)+(-1)^n)/5)/5.at n=6A191010
• Least positive squarefree integer k such that Q(sqrt(k)) has a class number greater than that of any previous integer.at n=11A279908
• Number of n X 2 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=6A280955
• Number of nX7 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=1A280960
• T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=29A280961