19586

Appears in sequences

• Coordination sequence for MgZn2, Position Zn2.at n=35A009938
• Numbers such that the sum of the factorials of the digits of the fifth power is a square.at n=21A126078
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1001-1111-0110 pattern in any orientation.at n=15A147415
• a(n) = 100*n^2 - n.at n=13A157659
• a(n) = 400*n^2 - 2*n.at n=6A158316
• a(n) = 196*n^2 - 14.at n=9A158553
• Expansion of 1/(1 - Sum_{i>=1, j>=1} i*j*x^(i*j)).at n=9A318493
• E.g.f. satisfies A(x) * log(A(x)) = (exp(x*A(x)) - 1)^3 / 6.at n=8A357089
• a(n) = Sum_{k=1..n-1} sigma(k)*sigma_3(n-k).at n=11A374963