1.1 : $a_n = a_{n-1} + a_{n-2} , a_1= 1, a_2 = 2$ ทุก $n \ge 3$
หรือ $a_n = a_{n-1} + a_{n-2} , a_0= 1, a_1 = 1$ ทุก $n \ge 2$
1.2 : $a_n = a_{n-1} + a_{n-2} + a_{n-3} , a_0= 1, a_1 = 1, a_2 = 2$ ทุก $n \ge 3$
2.1 : $a_n = (1+\frac{r}{100})a_{n-1} , a_1 = (1 + \frac{r}{100})A$ ทุก $n \ge 2$
2.2 : $a_n = (1+\frac{r}{100})a_{n-1} + B, a_1 = (1 + \frac{r}{100})A$ ทุก $n \ge 2$
3. $a_n = 4a_{n-1} , a_1 = 4$ ทุก $n \ge 2$
4. เหมือนข้อ 1.1
5.1 : $a_n = 2(a_{n-1}+a_{n-2}) , a_0 = 1, a_1 = 3$ ทุก $n \ge 2$
5.2 : $a_n = 2(a_{n-1}+a_{n-2} + a_{n-3}) , a_0 = 1, a_1 = 3, a_2 = 9$ ทุก $n \ge 3$