62023

Appears in sequences

• Smallest i such that prime(n) divides gcd(sigma(i), phi(i)) (cf. A009223).at n=17A222714
• Triangle read by rows: T(0,0)=1; for n>=1 T(n,k) is the numerator of the coefficient of x^k in the characteristic polynomial of the matrix realizing the transformation to Jacobi coordinates for a system of n particles on a line.at n=39A223256
• Triangle read by rows: T(0,0)=1; for n>=1 T(n,k) is the numerator of the coefficient of x^k in the characteristic polynomial of the matrix realizing the transformation to Jacobi coordinates for a system of n particles on a line.at n=41A223256