170761

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 5x + 2.at n=13A023313
• a(n) = A255283(2^n-1).at n=8A255284
• Least number that reaches 1 after n iterations of the map k -> usigma(k)/ud(k) if ud(k) | usigma(k), and k -> 1 otherwise, where ud(k) is the number of unitary divisors of k (A034444) and usigma(k) is their sum (A034448).at n=13A334816
• The number of lattice points in the 2D plane contained between the curve y=x^2/4 and the line y=n^2, inclusive, where n is a positive integer.at n=40A385730
• Prime numbersat n=15564