276025
domain: N
Appears in sequences
- RMS values of the RMS numbers: a(n) is the root mean square of the divisors of A140480(n).at n=33A141812
- Hypotenuse C of primitive Pythagorean triangles such that perimeters are Averages of twin prime pairs, q=p+1, a=q^2-p^2, c=q^2+p^2, b=2*p*q, s=a+b+c, s-+1 are primes.at n=24A155175
- Numbers k such that sigma(2*k-1) is a prime p.at n=22A247820
- a(n) is the number of 5 element sets of distinct integer sided strict rectangles that fill an n X n square.at n=28A387605