[seqfan] Re: Look and Say novelty? (correction)
Eric Angelini
Eric.Angelini at kntv.be
Thu Jan 29 13:16:24 CET 2009
... ok, cut/pasting my mind after Roddick/Federer -- I rewind
and correct the previous posts:
---
Hello SeqFans,
I like this finite one -- which kind of self-constructs nicely:
S = 22, 3233, 424344
52535455
6263646566
727374757677
82838485868788
9293949596979899
... a(n) says: "Look, we have so far in the sequence (including my
digits), this quantity of digits 'a', that quantity of digits 'b',
etc."
Example: a(2) says "there are three 2's far (including my digits)"
-> yes, the two 2's of a(1) and the '2' of a(2);
"there are three 3's so far"
-> yes, my three 3's.
a(3) says "there are four 2's, four 3's, four 4's so far
(including my digits)"
-> yes, ...
Are there other such sequences, with different starts for instance?
(I'm searching a sequence containing 1's).
Best,
É.
More information about the SeqFan
mailing list