28793

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 77.at n=32A020416
• Differences between numbers k such that k and k+1 have the same sum of divisors.at n=36A054001
• Smaller of two consecutive primes whose sum is a square.at n=18A061275
• n*10^2-1, n*10^2-3, n*10^2-7 and n*10^2-9 are all prime.at n=34A064976
• Lesser of consecutive primes whose sum is a perfect power (A001597).at n=23A091624
• a(n) = Prime(tribonacci(n)).at n=14A113842
• Numbers n such that 6*5^n + 1 is prime.at n=15A143279
• Primes of the form 2n^2 - 7.at n=32A201714
• Primes of the form 8n^2 - 7.at n=13A201858
• T(n,k)=Number of nXk binary arrays with no two ones adjacent horizontally, diagonally or antidiagonally.at n=47A228683
• Number of 3 X n binary arrays with no two ones adjacent horizontally, diagonally or antidiagonally.at n=7A228684
• Primes p such that 100p-1, 100p-3, 100p-7, and 100p-9 are all prime.at n=5A243409
• Numbers k such that k!!! - 3^k is prime.at n=31A261316
• Number of 2 X 2 matrices with all elements in {-n,..,0,..,n} with determinant = 2*permanent.at n=29A280343
• Compound filter (summands of A004001 & summands of A005185): a(n) = P(A286541(n), A286559(n)), where P(n,k) is sequence A000027 used as a pairing function, with a(1) = a(2) = 0.at n=31A286560
• Primes that can be generated by the concatenation in base 3, in ascending order, of two consecutive integers read in base 10.at n=37A287300
• Primes in A338529/2.at n=14A338533
• a(n) is the smallest prime that starts the first occurrence of exactly n consecutive primes in A381019.at n=35A381616
• Primes p such that p+1 is a triprime and 2*p+1 is prime.at n=45A386295
• Prime numbersat n=3136