28429

Properties

Appears in sequences

• Numbers k such that 6!*(2*k-7)!/(k!*(k-1)!) is an integer.at n=30A004786
• Numbers k such that 7!*(2k-8)!/(k!*(k-1)!) is an integer.at n=34A004787
• Magnanimous primes: primes with the property that inserting a "+" in any place between two digits yields a sum which is prime.at n=49A089392
• Primes of the form p = prime(k) = (prime(k+3)+prime(k-1))/2.at n=29A126238
• Prime numbers that are the sum of consecutive prime numbers with the final digit 1 (primes in A030430).at n=7A129077
• Mother primes of order 11.at n=35A136070
• Primes of the form x^2 + 5*y^2, where x and y=x+1 are consecutive natural numbers.at n=20A176608
• Sum of the numbers already removed (including the target number) in the first jump of a Sieve of Eratosthenes table.at n=35A179654
• (Partial sums of the squarefree integers) that are prime.at n=14A194128
• Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.at n=16A252247
• Number of length-4 0..n arrays with no repeated value differing from the previous repeated value by more than one.at n=11A269584
• Expansion of Product_{k>=1} 1/(1 - x^(2*k) - x^(3*k)).at n=35A276519
• Smallest prime p such that the Diophantine equation x + y + z = p with x*y*z = k^3 (0 < x <= y <= z) has exactly n solutions.at n=42A290401
• Primes having only {2, 4, 8, 9} as digits.at n=27A386159
• Prime numbersat n=3093