549791

Appears in sequences

• a(n) = sigma_5(n^5)/sigma(n^5).at n=1A077456
• Numbers of the form (2^(i*j)-1)/((2^i-1)*(2^j-1)) where gcd(i,j) = 1.at n=17A112674
• a(n) is the least positive integer in base n that when multiplied by 2n-1 will contain only the digits 0 and 1.at n=31A337624