IMO 1988 LL FRG16
Show that if n runs through all positive integers, f(n) =
IMO 1988 LL FRG16
Origin: FRG
Problem
Show that if n runs through all positive integers, f(n) = n + n/3 + 1/2 runs through all positive integers skipping the terms of the sequence an = 3n2 −2n.