1 Itching all over OR Unexplained bruising-Causes of Any Symptom.
A man named Leonardo Pisano, who was known by his nickname, Fibonacci, and named the series after himself, first discovered the Fibonacci sequence around 1200 A.D. The Fibonacci sequence is a sequence in which each term is the sum of the 2 numbers preceding it. The first 10 Fibonacci numbers are: (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89). These numbers are obviously recursive.
Guy (1990) notes the curious fact that for, 1, ... gives 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, ..., but then continues 91, 149, ... (OEIS A005181). Taking the product of the first Fibonacci numbers and adding 1 for, 2, ... gives the sequence 2, 2, 3, 7, 31, 241, ... (OEIS A052449). Of these, 2, 2, 3, 7, 31, 241, 3121, ... (OEIS A053413) are prime, i.e., the terms 1, 2, 3, 4, 5, 6, 7, 8, 22, 28, ...