86688

Appears in sequences

• sigma_3(n): sum of cubes of divisors of n.at n=41A001158
• Sum of cubes of unitary divisors of n.at n=41A034677
• Theta series of E_8 lattice with respect to midpoint of edge.at n=17A045819
• a(0)=1, a(n) = sigma_3(2n).at n=21A091986
• a(0)=1, a(n) = sigma_3(3n).at n=14A092341
• 1/3 the number of n X 3 0..2 arrays with no element equal both to the element above and to the element to its left.at n=3A184688
• 1/3 the number of n X 4 0..2 arrays with no element equal both to the element above and to the element to its left.at n=2A184689
• T(n,k)=1/3 the number of nXk 0..2 arrays with no element equal both to the element above and to the element to its left.at n=17A184694
• T(n,k)=1/3 the number of nXk 0..2 arrays with no element equal both to the element above and to the element to its left.at n=18A184694
• Expansion of (E_4(q) - E_4(q^5)) / 240 in powers of q where E_4 is an Eisenstein series.at n=41A226333
• Sequences from the quartic oscillator.at n=7A228406
• Totients t such that the number of divisors of t equals the number of solutions of phi(x) = t.at n=40A305058
• Numbers with no 0 digit that are divisible by the sum of any two of their digits at distinct positions.at n=49A308561
• Numbers k such that phi(k) + uphi(k) = k, where phi is the Euler totient function (A000010) and uphi is the unitary totient function (A047994).at n=7A329729
• Sum of the cubes of the squarefree divisors of n.at n=41A351266
• G.f. A(x) satisfies: A(x) = x * (1 + A(x))^4 / (1 - 2 * A(x)).at n=6A366014
• The sum of unitary divisors of the smallest cubefull number that is a multiple of n.at n=41A369721
• The sum of unitary divisors of the smallest cubefull exponentially odd number that is divisible by n.at n=41A369759
• The sum of the unitary divisors of the smallest cube divisible by n.at n=41A390665