Level 10

Hint 1: Morris
Hint 2: hettingertools

technically, should be TypeError, or else change a to:

[[1], [1, 1], [2, 1], [1, 2, 1, 1], [1, 1, 1, 2, 2, 1]

strings are sequences too

>>> a = [1, 11, 21, 1211, 111221]
>>> len(a[4])
Traceback (most recent call last):
File "<interactive input>", line 1, in ?
TypeError: len() of unsized object

>>> a = [1, 11, 21, 1211, 111221]

You could use

>>> a = ['1', '11', '21', '1211', '111221']

instead.

I don't think that you need to use anything like that. A plain '1' is enough to start the algorithm.

Algorithm, huh?

I don't understand the sequence.

Presumably, given a[n] through a[n+4], you should be able to find a[n+5]. I don't see a pattern though. It's no "triangle" that I know of.

I don't think that you need to use anything like that. A plain '1' is enough to start the algorithm.

Well, it might be enough once you know the algorithm, but it would be very hard to figure out the pattern just from that one '1'. After all, there are an infinite number of sequences that start with 1, including {1, 2, 3, ...} and {1, 2, 4, ...} and {1, -1, 1, ...} and even {1, 1, 1, ...}. And course, the actual solution, which is completely unrelated to any of those.

I need a tip for this one....

--
JP

tip: check the very first post from me. google for the first hint along with some of the numbers.

Hint: You'd get a different sequence if we didn't use base-10 counting.

[mjpieters]

Try googling for more hints.

thanks, got it!

--
JP

I must be doing something wrong. I found the sequence, found item 30 of it, and counted the length. Then I tried http://www.pythonchallenge.com/pc/return/<length>.html
but got nowhere. Is my error in the length or the url?

[thesamet]

Probably wrong length. note that this is a pythonic list.

I must be doing something wrong. I found the sequence, found item 30 of it, and counted the length. Then I tried http://www.pythonchallenge.com/pc/return/<length>.html
but got nowhere. Is my error in the length or the url?