Fibonacci

Fibonacci was an Italian mathematician from 13th century Pisa.

The Eighth Doctor stopped the Sulumian Thorgan from killing Fibonacci before the Italian had written the Liber quadratorum. (PROSE: The Gallifrey Chronicles)

The Weave's life cycle similar to a Fibonacci code, with each name a successive number added to the last. When the Eleventh Doctor met a Weave named 6011, she confirmed that the Weave before her was 3715, and the one after her was 9726. (PROSE: The Glamour Chase)

Behind the scenes

 * 6011 is the 16th number of a Fibonacci-type sequence which starts with 3 and 8.