158801

Appears in sequences

• Denominators of continued fraction convergents to sqrt(99).at n=9A041179
• Denominators of continued fraction convergents to sqrt(396).at n=9A041753
• Denominators of continued fraction convergents to sqrt(891).at n=13A042723
• a(n) = n^4 - 3*n^2 + 1.at n=20A057722
• Nonprime numbers k such that (k+1)*Sum_{d|k} 1/(d+1) is an integer.at n=23A069155
• Numbers k such that 99*k^2 + 1 is a square.at n=5A075843
• Chebyshev polynomial of the second kind U(4,n).at n=10A144139
• Smallest semiprime p1*p2 such that p2 mod p1 = n and no prime is used more than once in the sequence.at n=39A386256