In the non-decreasing sequence of odd integers \( \left(a_{1}, a_{2}, a_{3}, \ldots\right)=\{1,3...

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In the non-decreasing sequence of odd integers \( \left(a_{1}, a_{2}, a_{3}, \ldots\right)=\{1,3,3,3,5,5,5,5,5, \ldots\} \) each positive odd intcyerk appears \( k \) times. It is \( a \) fact that there are integers \( b, c \) and \( d \) such that for all positive integer \( n, a_{n}=b[\sqrt{n+c}]+d \) (where .. denotes greatest integer function).
The possible value of \( \frac{b-2 d}{8} \) is
(a) 0
(b) 1
(c) 2
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