106688

Appears in sequences

• T(n,n), array T as in A047150.at n=10A047152
• Numbers k such that phi(k) + k is a fourth power.at n=33A114072
• a(n) = Sum_{k=1..n} (k/gcd(n, k))^4.at n=15A343514
• a(n) = (3/2)*A019565((2n-1)^2) - A019565(A001065((2n-1)^2)), where A019565 is the base-2 exp-function, and A001065 is the sum of proper divisors of n.at n=9A379501