Fibonacci numbers are so appealing to our human propensity to see patterns that they have their own quarterly published continuously for more than 50 years.<p><a href="http:&#x2F;&#x2F;www.fq.math.ca&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.fq.math.ca&#x2F;</a><p>Fibonacci illustrated the sequence using the growth of a rabbit population, though one where rabbit immortality was assumed. As Knuth says:<p><i>Fibonacci numbers have often been observed in nature, probably for reasons similar to the original assumptions of the rabbit problem.</i> [TAoCP: Volume 1, 2nd edition.p 79]