For 10 points, name this 19th-century French mathematician who lends his name to a series of numbers which are similar to the Fibonacci numbers, but begin with 1 and 3 instead of 1 and 1.
This mathematician found the only cannonball number, or a number which is both a square-pyramid number and a square number, namely 4,900. He also developed a primality test for Mersenne numbers and holds the record for largest (*) prime number found by hand, which is 2127-1. His work Récréations Mathématiques references the Analytical Engine and the Tower of Hanoi puzzle, which he invented and marketed under the name N. Claus de Siam, an anagram of a form of his own name. For 10 points, name this 19th-century French mathematician who lends his name to a series of numbers which are similar to the Fibonacci numbers, but begin with 1 and 3 instead of 1 and 1.
This mathematician found the only cannonball number, or a number which is both a square-pyramid number and a square number, namely 4,900.
Édouard Lucas [accept Lucas d’Amiens] &lt;PB&gt;