zài / zhè / ge / suàn / fǎ / zhōng / wǒ / men / xiān / shè / dìng / chū / shǐ / zhí / zài / tōng / guò / dì / tuī / qiú / chū / hòu / miàn / de / gè / xiàng

在这个算法中，我们先设定初始值，再通过递推求出后面的各项。

In this algorithm, we first set the initial value and then use recursion to find the later terms.