View Full Version : 1,11,21,1211,111221,312211.What is next & why?
marklilly
May 3, 2009, 01:22 PM
What is this sequence?
tickle
May 3, 2009, 01:38 PM
Why do you want to know ? Is it because you have a lot of time on you hands and needed to ask a question about number sequencing ?
Curious tick
ebaines
May 4, 2009, 11:06 AM
A pretty big number:
13112221
A classic sequence, though one that has nothing to do with mathematics. Here's a hint - each entry in the sequence is a description of what came before.
galactus
May 4, 2009, 01:31 PM
See here. You could try this site anytime you have a sequence. It doesn't have all them, though.
1,11,21,1211,111221,312211 - OEIS Search Results (http://www.research.att.com/~njas/sequences/?q=1%2C11%2C21%2C1211%2C111221%2C312211&sort=0&fmt=0&language=english&go=Search)