62748518

Appears in sequences

• a(n) = sigma_7(n), the sum of the 7th powers of the divisors of n.at n=12A013955
• Numerator of sum of -7th powers of divisors of n.at n=12A017677
• Sum of seventh powers of unitary divisors.at n=12A034681
• Numbers n such that n^3 is palindromic in base 13.at n=18A046247
• Sum of two powers of 13.at n=28A072390
• a(n) = sigma_7(2n-1).at n=6A081865
• a(n) = Sum_{0<d|n, n/d odd} d^7.at n=12A096961
• a(0) = 0, a(n) = 13^(n-1) + 1.at n=8A141012
• a(n) = n^7 + 1.at n=13A258806
• a(n) = Sum_{d|n} (-1)^(d-1)*d^7.at n=12A321546
• a(n) = Sum_{d|n} (-1)^(n/d+1)*d^7.at n=12A321552
• a(n) = Sum_{d divides n} (-1)^(d + n/d) * d^7.at n=12A321563
• Sum of 7th powers of odd divisors of n.at n=12A321811
• Sum of 7th powers of odd divisors of n.at n=25A321811
• a(n) = Sum_{d|n, d==1 mod 4} d^7 - Sum_{d|n, d==3 mod 4} d^7.at n=12A321823
• a(n) = Sum_{d|n, d==1 mod 4} d^7 - Sum_{d|n, d==3 mod 4} d^7.at n=25A321823
• a(n) = Sum_{d|n, n/d==1 mod 4} d^7 - Sum_{d|n, n/d==3 mod 4} d^7.at n=12A321831
• Sum of the 7th powers of the squarefree divisors of n.at n=12A351270
• a(n) = n^7 * Product_{p|n, p prime} (1 + 1/p^7).at n=12A351302
• Sum of the 7th powers of the odd proper divisors of n.at n=25A352035