126445

Appears in sequences

• a(n) = Sum_{k=1..n-1} k^3*sigma(k)*sigma(n-k).at n=10A000499
• a(n) = A008893(n)/2.at n=19A152041
• Numbers n such that psi(n) = 2*phi(n).at n=39A292390
• Consider the non-unitary aliquot parts, in ascending order, of a composite number. Take their sum and repeat the process deleting the minimum number and adding the previous sum. The sequence lists the numbers that after some iterations reach a sum equal to themselves.at n=11A307859
• Coefficients T(n,k) of x^n*y^(n-k)*z^k in function A = A(x,y,z) such that A = 1 + x*B*C, B = 1 + y*C*A, and C = 1 + z*A*B, as a triangle read by rows.at n=68A323324
• Coefficients T(n,k) of x^n*y^(n-k)*z^k in function A = A(x,y,z) such that A = 1 + x*B*C, B = 1 + y*C*A, and C = 1 + z*A*B, as a triangle read by rows.at n=75A323324