106224

Appears in sequences

• a(n) = 2*a(n-1) - a(n-3) + 2*a(floor(n/2)) + 3*a(floor(n/3)) + ... + n*a(floor(n/n)), where a(0) = 1, a(1) = 1, a(2) = 1.at n=17A298408
• a(n) = Sum_{k=1..n} sigma( (n/gcd(k,n))^3 ).at n=17A372998
• Positions of powerful terms among the numbers satisfying Euler's condition for odd perfect numbers (A228058).at n=23A388279