84524
domain: N
Appears in sequences
- Numbers k such that both k and k+1 are abundant.at n=22A096399
- Numbers k such that both sigma(k) >= 2*k-1 and sigma(k+1) >= 2*(k+1)-1.at n=24A103289
- Numbers k such that both k and k+1 are Zumkeller numbers (A083207).at n=20A328327
- Numbers k such that both k and k+1 are recursive abundant numbers (A333928).at n=2A333951
- Numbers k such that k and k+1 are both primitive Zumkeller numbers (A180332).at n=1A361934
- Numbers k such that k and k+1 are both S-abundant numbers (A181487).at n=7A364861
- Symmetric difference of the primitive non-deficient numbers and the primitive Zumkeller numbers.at n=32A378538
- Numbers that are primitive Zumkeller, but not primitive non-deficient.at n=23A378657