305761

Properties

Appears in sequences

• Numerators of continued fraction convergents to sqrt(195).at n=7A041362
• Numerators of continued fraction convergents to sqrt(780).at n=7A042504
• Numbers k such that sigma(phi(sigma(k))) = phi(sigma(phi(k))).at n=37A067160
• Chebyshev T-polynomials T(n,14) with Diophantine property.at n=4A097310
• a(n) = ChebyshevT(4, n).at n=14A144130
• Primes of the form T_4(n), where T_4(x) = 8x^4 - 8x^2 + 1 is the fourth Chebyshev polynomial (of the first kind).at n=5A144131
• a(n) = 4802*n^2 - 196*n + 1.at n=7A157364
• Primes of the form 7n^2 - 6.at n=23A201852
• Prime numbersat n=26473