1874162

Appears in sequences

• sigma_4(n): sum of 4th powers of divisors of n.at n=36A001159
• Numerator of sum of -4th powers of divisors of n.at n=36A017671
• a(n) = Sum_{d|n, d==1 (mod 4)} d^4.at n=36A050448
• a(n) = Sum_{d|n, d==1 mod 4} d^4 - Sum_{d|n, d==3 mod 4} d^4.at n=36A050456
• Sum of 4th powers of odd divisors of n.at n=36A051001
• a(1)=0, a(n) is the smallest nonprime > (n-1)^smallest digit of a(n-1).at n=37A158320
• a(n) = (-1)^n * Sum_{2*m + 1 | 2*n + 1} (-1)^m (2*m + 1)^4.at n=18A204342
• a(n) = Sum_{ d >= 1, d divides n} (-1)^(n-d)*d^4.at n=36A279395
• Sum of the 4th powers of the squarefree divisors of n.at n=36A351267