155287

Appears in sequences

• a(n+1) = floor(a(n) * Sum_{k=0..n} 1/a(k)^s), where s = Sum_{k>=0} 1/a(k)^s and a(0)=1; s = 2.260568736857767...at n=16A080135
• RMS numbers: numbers n such that root mean square of divisors of n is an integer.at n=19A140480
• Primitive RMS numbers: RMS numbers which are not the product of two smaller RMS numbers.at n=10A141813
• Composite RMS numbers: composite numbers c such that root mean square of divisors of c is an integer.at n=15A158287
• Expansion of Product_{k>=1} 1/((1-x^(3*k-1))*(1-x^(3*k-2)))^k.at n=38A262883
• Numbers m such that the arithmetic mean and the quadratic mean (the root mean square) of the divisors of m are both integers.at n=19A327055
• For 1<=x<=n, 1<=y<=n, write gcd(x,y) = u*x+v*y with u,v minimal; a(n) = sum of the values of u^2+v^2.at n=44A345434