177075397

Properties

Appears in sequences

• Bisection (even part) of Chebyshev sequence with Diophantine property.at n=10A077240
• Combined Diophantine Chebyshev sequences A077240 and A077239.at n=20A077242
• a(n) = ((5 + 2*sqrt(2))*(1 + sqrt(2))^n + (5 - 2*sqrt(2))*(1 - sqrt(2))^n)/2.at n=20A163607
• Positive integer k such that k^2 = p^2 + q^2 - 1 where p and q are consecutive primes.at n=13A271050
• Prime numbersat n=9876274