Let m be an integer . Let us say that m is a SPA number if there are positive
whole numbers k and j such that
m = (mk + mj) / 2.
Find all SPA numbers.
(In reply to
re: more cases by Ady TZIDON)
Ady - You are right - I fixed #4
Also you are strictly right - the q. asked only for all SPA #'s, and these are are _all_ the integers. But also, it's fun to "count the ways" this could happen.
Edited on August 4, 2019, 4:53 pm
re(2): more cases
