49207

Properties

Appears in sequences

• Numbers n such that 2^n - 2^((n + 1)/2) + 1 is prime.at n=16A007670
• Numbers m such that (1+i)^m + i is a Gaussian prime.at n=31A027206
• Numbers n such that (1+i)^n - 1 times its conjugate is prime.at n=28A057429
• a(0) = 1; a(n) = (5*3^(n-1) - 1)/2 for n > 0.at n=10A060816
• Smallest prime p such that 2*p+1 has n prime factors (with multiplicity).at n=9A072060
• Number of ways associated with A088959.at n=31A088111
• Primes p whose Zeckendorf-expansion A014417(p) is palindromic.at n=16A095730
• a(0)=3, a(n) = 3*a(n-1) + 2*(-1)^n.at n=9A096019
• Expansion of (1+2x-x^3+x^4)/(1-4x^2+3x^4).at n=19A181655
• Expansion of (1+2*x+2*x^2-x^3)/((1-x)*(1+x)*(1-3x^2)).at n=19A220946
• Primes p such that p == i mod d(i) where d(i) are the prime divisors of 2p+1.at n=21A281317
• a(n) = n+1 for n <= 2; otherwise a(n) = 3*a(n-3)+1.at n=28A329774
• a(n) is the least prime of the form (3^j*5^k - 1)/2, j > 0, k > 0, j + k = n. a(n) = 0 if no such prime exists.at n=8A337423
• Least number m for which there exists some positive k < m where the sum of the integers from k + 1 to m inclusive is an n-th power > 1.at n=18A372782
• Positions of records in A205561.at n=37A378189
• Prime numbersat n=5059