7380481

Properties

Appears in sequences

• a(n) = 8*a(n-1) - a(n-2); a(0) = 1, a(1) = 4.at n=8A001091
• a(n) = 2*a(n-1)^2 - 1, a(0) = 4, a(1) = 31.at n=3A005828
• Numerators of continued fraction convergents to sqrt(15).at n=15A041022
• Numerators of continued fraction convergents to sqrt(60).at n=15A041104
• Numerators of continued fraction convergents to sqrt(240).at n=7A041448
• Numerators of continued fraction convergents to sqrt(960).at n=7A042858
• a(n)*a(n+3) - a(n+1)*a(n+2) = 3, given a(0)=a(1)=1, a(2)=4.at n=16A080871
• a(n) = 2*a(n-1)^2 - 1, a(0)=1, a(1)=4.at n=4A084764
• 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=8A144131
• Primes of the form ChebyshevT[8,n].at n=1A144132
• Denominators in continued fraction expansion of sqrt(3/5).at n=15A145543
• a(n) = cosh(2 * n * arccosh(n)).at n=4A173129
• Array of (k^n + k^(-n))/2 where k = (sqrt(x^2-1) + x)^2 for integers x >= 1.at n=31A188644
• 128*n^8 - 256*n^6 + 160*n^4 - 32*n^2 + 1.at n=4A243134
• Prime numbersat n=500752