1, 3, 7, 13, 21, ...
What is the 600th member of the series?
What member, above the first, with fewer than 5 digits, is a perfect cube?
What member is a 5-digit palindrome that can also be read as a binary number?
What's the smaller of the two consecutive members that are 1000 apart?
Wish I could stay around to offer all.
There is a delightful use of 2 here as we increment through the sequence.
I've determined with massive grey matter destruction that the palindrome is 11111, 10101 or 10001.
Perfect cube? 1681 is a perfect cube and perfect square - but not this time.What member, above the first,
implies after 1. 2x2x2 = 8.
Posted by brianjn
on 2007-05-07 09:35:54