FIBONACCI SEQUENCE: Astonishing Divisibilities! The Fibonacci Sequence has many amazing properties, one of them being its immense range of “Divisibilities”. This is the same as factoring or division. It’s a good practice to learn the first 17 Fibonacci Numbers that goes up 1,597, a good practice to strengthen your Memory Power. First let’s list the first 17 Fib Nos. aka FN. 1–2–3–4–5–6– 7–8– 9– 10–11–12– 13– 14–15– 16– 17 1–1–2–3–5–8–13–21–34–55–89–144–233–377–610–987–1597 Observe: - F12 = 144.