22a. ss3
A short summing practice problem.
Design and test a function ss3: number(a) number(b) -> number to sum
the squares of every third number from a to b. Skip multiples of
ten.
(ss3 14 23) = 14^2 + 17^2 + 23^2
(ss3 14 18) = 14^2 + 17^2
(ss3 10 40) = 6165