22013

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 77.at n=28A020416
• Largest prime < e^n.at n=9A040016
• Prime(n) and prime(n+2) use the same digits.at n=28A069794
• Primes p such that 3*p+2, 5*p+4 and 7*p+6 are also prime.at n=23A173876
• Primes p such that 2p+1, 3p+2 and 5p-2 are also primes.at n=22A178068
• a(n) = 3*a(n-1) + a(n-2) with a(0)=2 and a(1)=5.at n=8A180148
• Cyclops Sophie-Germain primes.at n=10A183058
• Cyclops primes p such that 2p+1 is also a Cyclops prime.at n=5A183059
• Number of n X 2 0..3 arrays with rows and columns lexicographically nondecreasing read forwards and nonincreasing read backwards.at n=39A201975
• a(n) = prime((a(n-1) + a(n-2)) / 2) for n>1, with a(0) = 3, a(1) = 5.at n=9A225504
• Seventh prime p such that (p+n)^2+n is prime but (p+j)^2+j is not prime for all 0<j<n.at n=23A238679
• a(n+1) is the smallest prime > a(n) such that the digits of a(n) are all (with multiplicity) contained in the digits of a(n+1), with a(1)=2.at n=11A242904
• Primes of the form k*(k+2)/3 - 3, k>2.at n=29A262203
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 243", based on the 5-celled von Neumann neighborhood.at n=15A280147
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 918", based on the 5-celled von Neumann neighborhood.at n=14A284410
• Primes p not of the form k^2+s where k > 1 and 1 <= s < (k+1)^2, such that q = k^4+s is prime.at n=33A302485
• Lexicographically earliest sequence of nonnegative integers such that two distinct terms differ by at least 4 decimal digits.at n=20A346000
• Prime numbersat n=2466