52026

Appears in sequences

• Numbers n such that 65*2^n-1 is prime.at n=30A050558
• Area of the Pythagorean triangle a = u^2 - v^2 (cf. A096382) when u=3, v=4,4,5,...at n=22A096383
• Squarefree positive integers of the form u*v*(u^2-v^2) for some integer u,v.at n=27A147779
• Upper Pythagorean twins.at n=25A228877
• Numbers n such that phi(sigma*(n)) = sigma*(phi(n)), where sigma*(n) is the sum of anti-divisors of n and phi(n) is the Euler totient function.at n=10A243996
• Integers m such that iterating the map f(x) = x^2 + 1 on m generates a number ending with m.at n=21A350130
• a(n) = period length of the sequence A020639(n^k - 1), k >= 1.at n=65A368811