Promotrimo niz

brojeva koje možemo dobiti zbrajanjem potencija broja

(dakle taj niz počinje ovako:

). Ako je

, koliko je

?
Consider the sequence

of numbers that can be obtained as sums of distinct powers of

(so the sequence begins

). If

, what is

?
[lang=hr]
Promotrimo niz $a_n$ brojeva koje možemo dobiti zbrajanjem potencija broja $5$ (dakle taj niz počinje ovako: $1,5,6,25,26,31,\dots$). Ako je $a_1=1$, koliko je $a_{200}$?
[/lang]
[lang=en]
Consider the sequence \((a_n)\) of numbers that can be obtained as sums of distinct powers of \(5\) (so the sequence begins \(1,5,6,25,26,31,\dots\)). If \(a_1=1\), what is \(a_{200}\)?
[/lang]