91664

Appears in sequences

• a(n) = n*(7*n^2-4)/3.at n=34A063521
• Numbers k such that both k and k+1 are abundant.at n=25A096399
• Numbers k such that both sigma(k) >= 2*k-1 and sigma(k+1) >= 2*(k+1)-1.at n=27A103289
• Numbers k such that both k and k+1 are Zumkeller numbers (A083207).at n=23A328327
• Numbers k such that each of k and k+1 is either a practical number (A005153) or an almost practical number (A174533).at n=16A387654