108324

Appears in sequences

• Amicable triples: numbers such that sigma(x) = sigma(y) = sigma(z) = x+y+z, x<y<z. We order these triples according to the common value of sigma. Sequence gives z numbers.at n=21A125492
• a(n) = 378*n^2 - 54*n (n>=1).at n=16A305070