55297
domain: N
Appears in sequences
- Numbers n such that sigma(n) - n - 1 = pi(n).at n=11A064439
- Least number x such that gcd(phi(x), sigma(x)) = n.at n=37A073815
- Smallest number m such that GCD(a+b,a-b) = n, where a = sigma(m) and b = phi(m).at n=37A077102
- Pierpont 3-almost primes. 3-almost primes of form (2^K)*(3^L)+1.at n=16A112797
- a(n) = 54*n^2 + 1.at n=32A158646
- Augmentation of the triangle A193605. See Comments.at n=32A193606
- Number of compositions of n where the difference between largest and smallest parts equals 8 and adjacent parts are unequal.at n=17A214277
- a(n) = [x^n] Product_{k=1..n} 1/(1 - (n - k + 1)*x^k).at n=6A303175
- Sum of the positive differences of the cubed parts in each partition of n into two parts.at n=22A335639