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Topic: What's this series? (Read 636 times) |
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Quetzycoatl
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What's this series?
« on: Dec 22nd, 2003, 1:37pm » |
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9, 81, 18, 81, 9, 702, 9, 171, 27....?
1) what are the next few terms of this series?
2) what does this series describe?
3) can you write a formula to predict elements of this series?
-Quetzycoatl
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| « Last Edit: Dec 22nd, 2003, 1:58pm by Quetzycoatl » |
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Icarus
wu::riddles Moderator
Uberpuzzler
Boldly going where even angels fear to tread.
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Re: What's this series?
« Reply #1 on: Dec 22nd, 2003, 3:55pm » |
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Please don't post the same thread in 2 different forums. It causes the discussion to become disjointed. I'm locking this thread for now, and will delete it later. For those interested, the same thread is in the Hard forum, and replies may be posted there.
(I left that one, since the Hard forum receives considerably more attention than this one!)
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"Pi goes on and on and on ...
And e is just as cursed.
I wonder: Which is larger
When their digits are reversed? " - Anonymous
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