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What came first? (Posted on 2002-12-04) Difficulty: 3 of 5
Find the first number in the following series. (there may be more than one answer?)

?, 2 ,3 , 8, 30, 144, 840, 5760, 45360...

See The Solution Submitted by Cory Taylor    
Rating: 3.0000 (8 votes)

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Puzzle Solution | Comment 11 of 12 |

The pth term of the sequence is equal to p!/(p-1).

Thus, the first term of the sequence is equal to 1!/0 = 1/0 which is undefined.

Edited on March 15, 2008, 3:47 am
  Posted by K Sengupta on 2008-03-15 03:46:58

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