51679

Properties

Appears in sequences

• a(n) = T(2*n+2,n), array T as in A055216.at n=9A055218
• Primes p such that p-1 and p+1 are both divisible by fourth powers.at n=31A086709
• Successive record-setters for tau(n+1)*tau(n-1)/tau(n)^2, where tau(n) is the number of divisors of n.at n=25A094342
• Primes of the form (p^2 - 1)/8 - p, where p is also a prime.at n=27A165567
• Primes of the form p=floor(T/6), T are triangular numbers.at n=36A171595
• Primes of the form 8*k^2 + 6*k - 1 for positive k.at n=41A187677
• Number of (n+1) X (4+1) 0..2 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements.at n=6A251133
• Number of (n+1) X (7+1) 0..2 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements.at n=3A251136
• The set S of primes q satisfying certain conditions (see Müller, 2010 for precise definition).at n=12A275739
• Prime numbers p such that all prime factors of p+1 and p-1 are smaller than the cube root of p.at n=23A283791
• Primes of the form k!3-6561, where k!3 is the triple factorial number (A007661).at n=0A289823
• Number of nX6 0..1 arrays with every element equal to 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero.at n=12A298886
• Primes p such that min(d(p-1), d(p+1)) is larger than the corresponding values of all previous primes, where d(n) is the number of divisors of n (A000005).at n=16A319823
• Number of multisets whose right half (inclusive) sums to n.at n=31A360671
• Prime numbersat n=5289