387440173

Appears in sequences

• a(n) = sigma_9(n), the sum of the 9th powers of the divisors of n.at n=8A013957
• Numerator of sum of -9th powers of divisors of n.at n=8A017681
• Cyclotomic polynomials at x=3.at n=27A019321
• a(n) = sigma_n(n): sum of n-th powers of divisors of n.at n=8A023887
• a(n) = 1^n + 3^n + 9^n.at n=9A034513
• Zsigmondy numbers for a = 3, b = 1: Zs(n, 3, 1) is the greatest divisor of 3^n - 1^n (A024023) that is relatively prime to 3^m - 1^m for all positive integers m < n.at n=26A064079
• a(n) = sigma_9(2n-1).at n=4A081866
• a(n) = Sum_{0<d|n, n/d odd} d^9.at n=8A096962
• A modified Legendre-binomial transform of 2^n for p=3.at n=18A117983
• 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=26A175174
• Triangle of numbers 2^i*C(n,i) mod 3 converted to decimal.at n=18A182069
• Set x=3 in polynomial corresponding to A253091(n).at n=18A255286
• Sum of n-th powers of odd divisors of n.at n=8A292919
• Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = Sum_{d|n} d^(n+k).at n=44A308504
• a(n) = Sum_{d|n} (-1)^(n/d+1)*d^n.at n=8A321438
• a(n) = Sum_{d|n} (-1)^(d-1)*d^9.at n=8A321548
• a(n) = Sum_{d|n} (-1)^(n/d+1)*d^9.at n=8A321554
• a(n) = Sum_{d divides n} (-1)^(d + n/d) * d^9.at n=8A321565
• Sum of 9th powers of odd divisors of n.at n=8A321813
• Sum of 9th powers of odd divisors of n.at n=17A321813