24977

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 95.at n=18A020434
• Numbers n such that 117*2^n-1 is prime.at n=43A050584
• a(n) is the lesser term of the smallest twin prime pair such that if P=(a(n)^2+n)^2+n, then P and P+2 are also twin primes. a(n) is 0 if no such pair exists.at n=10A093245
• a(n) is the lesser term of the smallest twin prime pair such that if P=(a(n)^2+n)^2+n, then P and P+2 are also twin primes. a(n) is 0 if no such pair exists.at n=45A093245
• Prime numbers that are 2 less than a prime-indexed odd triangular number or 1 more than a prime-indexed even triangular number.at n=29A096333
• Primes from merging of 5 successive digits in decimal expansion of e.at n=2A104846
• Primes of the form k^2 + 13.at n=28A138375
• Primes of the form x^2 + 7*y^2, where x and y=x+1 are consecutive natural numbers.at n=29A176616
• Least n-gap prime: a(n) = least prime p for which there is no prime between n*p and n*q, where q is the next prime after p.at n=28A195325
• Number of n X 3 0..2 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=42A201272
• Positions of 2 in sequence A217916.at n=28A217918
• Primes of the form triangular(p) + 1, where p is a prime.at n=14A231988
• Smallest prime Q such that prime(n)*(2*Q)^prime(n)-1 is prime.at n=31A245600
• Primes dividing nonzero terms in A003095: the iterates of x^2 + 1 starting at 0.at n=49A247981
• Initial members of prime quadruples (n, n+2, n+54, n+56).at n=26A248661
• Septic artiads: primes p congruent to 1 mod 14 for which all solutions of the congruence x^3 + x^2 - 2x - 1 == 0 (mod p) are 7th power residues.at n=3A270800
• Erroneous version of A270800.at n=3A271247
• Primes equal to a hexagonal number plus 1.at n=30A285790
• Primes equal to a centered 9-gonal number plus 1.at n=20A285812
• Engel expansion of exp(Pi/4).at n=12A329912