480000

Appears in sequences

• Euler totient function (A000010) of 2^n - 1.at n=19A053287
• Number of primitive (period n) periodic palindromes using exactly five different symbols.at n=15A056501
• Totient of the Woodall numbers (A003261), n*2^n -1.at n=15A056821
• a(n) is smallest number >= a(n-1) such that a(n) plus any set of the previous values of the sequence is a nonsquare; starting with a(1) = 2.at n=24A064776
• a(1) = 2, a(n+1) > a(n) is the smallest multiple of a(n) using only even digits.at n=12A078222
• Triangle read by rows: minimum inversion terminator in rooted labeled trees.at n=41A217877
• a(n) = 3*n^4.at n=20A219056
• Integer areas A of integer-sided cyclic quadrilaterals such that the length of the circumradius is a perfect square.at n=23A233315
• Numbers which have identical primes in n and d(n) but are not refactorable.at n=6A235525
• Numbers n such that phi(n) * tau(n) divides n^2, but neither tau(n) nor phi(n) divides n.at n=27A287800
• a(n) = phi(4^n-1), where phi is Euler's totient function (A000010).at n=9A295501
• Integer areas of integer-sided triangles where the lengths of two of the sides are cubes.at n=9A329536