4785157

Appears in sequences

• a(n) = sigma_7(n), the sum of the 7th powers of the divisors of n.at n=8A013955
• Numerator of sum of -7th powers of divisors of n.at n=8A017677
• a(n) = 1^n + 3^n + 9^n.at n=7A034513
• Numbers of the form (3^{mr}-1)/(3^r-1) for positive integers m, r.at n=39A076270
• a(n) = sigma_7(2n-1).at n=4A081865
• Triangular array, read by rows: T(n,k) = Sum_{d|n} d^k, 0 <= k < n.at n=43A082771
• a(n) = Sum_{0<d|n, n/d odd} d^7.at n=8A096961
• Least primitive number k such that 1/k is in the Cantor set and the fraction 1/k has period n in base 3.at n=20A175174
• a(n) = Sum_{d|n} d^(n-2).at n=8A308763
• a(n) = Sum_{d|n} (-1)^(d-1)*d^7.at n=8A321546
• a(n) = Sum_{d|n} (-1)^(n/d+1)*d^7.at n=8A321552
• a(n) = Sum_{d divides n} (-1)^(d + n/d) * d^7.at n=8A321563
• Sum of 7th powers of odd divisors of n.at n=8A321811
• Sum of 7th powers of odd divisors of n.at n=17A321811
• Sum of the 7th powers of the odd proper divisors of n.at n=17A352035
• Sum of the 7th powers of the odd proper divisors of n.at n=26A352035
• Sum of the 7th powers of the odd proper divisors of n.at n=35A352035