er>n</span><span class=special>==</span><span class=number>1</span><span class=special>?</span><span class=number>1</span><span class=special>:</span><span class=identifier>fibonacci</span><span class=special>(</span><span class=identifier>n</span><span class=special>-</span><span class=number>2</span><span class=special>).</span><span class=identifier>get</span><span class=special>()+</span><span class=identifier>fibonacci</span><span class=special>(</span><span class=identifier>n</span><span class=special