What are the next two numbers in this sequence?
1, 1, 7, 3, 23, 23, 111, 15, 351, 415, __, __

(In reply to some observations... by Erik O.)

Your first observation is correct, all the numbers in the sequence are odd. 

Your fourth (multiples of 3) is a consequence of the algorithm I used to generate the sequence. 

Your predictions of 1000-3000, 100-500 for the next two numbers are correct.

Posted by Brian Smith on 2004-06-03 11:51:54