45887

Properties

Appears in sequences

• a(n) is smallest safe prime (A005385) such that a(n) + 12*n is the next safe prime, i.e., x = (a(n) - 1)/2 and x + 6*n are closest Sophie Germain primes.at n=25A059327
• Consider the family of multigraphs enriched by the species of trees. Sequence gives number of those multigraphs with n arcs.at n=5A099719
• Primes of the form 16*k-1 such that 4*k-1 and 8*k-1 are also primes.at n=22A101793
• Primes of the form (4k^2 + 4k - 5)/5.at n=28A154619
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) and Hilbert 3-class field tower of exact length 3, except for the cases mentioned in the COMMENTS.at n=21A242878
• Smallest prime starting a sequence of 4 consecutive odd primes such that the center of the symmetrical gaps is 2n.at n=24A263171
• Primes equal to a centered heptagonal number plus 1.at n=19A285811
• Primes p such that p^7 - 1 has 8 divisors.at n=31A341669
• Numbers m such that Conv(b,m) = b has a unique nontrivial solution (b = 0 and b = 1 are considered trivial solutions). Here, Conv(b,m) denotes the limit of b^^t (mod m) as t goes to infinity.at n=26A347561
• a(n) = a(n-1) + rotate(a(n-1), n-1 digits right) with a(1) = 1.at n=11A374732
• Primes having only {4, 5, 7, 8} as digits.at n=38A386190
• Prime numbersat n=4753