532171

Appears in sequences

• a(n) = sigma_6(n), the sum of the 6th powers of the divisors of n.at n=8A013954
• Numerator of sum of -6th powers of divisors of n.at n=8A017675
• Cyclotomic polynomials at x=9.at n=9A019327
• Cyclotomic polynomials at x=-9.at n=18A020508
• Numbers k such that k^2 is palindromic in base 9.at n=34A029994
• Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0.at n=6A033145
• a(n) = 1^n + 3^n + 9^n.at n=6A034513
• Sums of 3 distinct powers of 9.at n=23A038488
• Numbers whose cube is palindromic in base 9.at n=12A046241
• a(n) = (n^2 - n + 1)*(n^2 + n + 1).at n=27A059826
• a(n) = n^6 + n^3 + 1.at n=9A060883
• Value of n-th cyclotomic polynomial at n.at n=8A070518
• Numbers of the form (3^{mr}-1)/(3^r-1) for positive integers m, r.at n=31A076270
• Numbers of the form (9^{mr}-1)/(9^r-1) for positive integers m, r.at n=12A076288
• Triangular array, read by rows: T(n,k) = Sum_{d|n} d^k, 0 <= k < n.at n=42A082771
• Central polygonal numbers that are nontrivially the product of two central polygonal numbers.at n=37A203173
• Smallest positive multiple of n whose base 9 representation contains only 0's and 1's.at n=36A244960
• a(n) = Sum_{d|n} (-1)^(n/d+1)*d^6.at n=8A284927
• Numbers that are palindromic in bases 3, 9 and 27.at n=22A308832
• a(n) = Sum_{d|n} (-1)^(d-1)*d^6.at n=8A321545