61488

Appears in sequences

• a(n) = sigma_3(n) - sigma_1(n).at n=38A092348
• Expansion of (b(q^6) * c(q^6)) / (b(q^3) * c(q^3)) in powers of q where b(), c() are cubic AGM theta functions.at n=29A102315
• Numbers that have exactly eight prime factors counted with multiplicity (A046310) whose digit reversal is different and also has 8 prime factors (with multiplicity).at n=7A109028
• 1/3 of the number of 3-colorings of an n X n array symmetric about main diagonal.at n=5A145237
• a(n) = 64*n^2 - 16.at n=30A157913
• a(n) = 961*n^2 - 2*n.at n=7A158410
• a(n) = 1*4*7 + 4*7*10 + 7*10*13 + ... (n terms).at n=9A196513
• a(n) = the smallest number k such that the base-10 digital sum of sigma(k) is n.at n=42A256635
• Dirichlet g.f.: (zeta(s-3) / zeta(s))^2.at n=25A338165