84210

Appears in sequences

• a(n) = a(n-1) + a(floor(n/2))^2 for n > 0, a(0) = 1.at n=13A067868
• a(n) = n*(n+1)*(n^2+1)/2.at n=20A071237
• Numbers k having exactly 5 distinct prime factors, the largest of which is greater than or equal to sqrt(k) (i.e., sqrt(k)-rough numbers with exactly 5 distinct prime factors).at n=32A115959