How to get a non-recursive formula for y(n):(adsbygoogle = window.adsbygoogle || []).push({});

y(n)=1 (n=1 or 2)

y(n)=0 (n=3 or 4)

y(n)=(y(n-4) + y(n-3))/2

Any hints apprecaited..

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# Non-recursive formula

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