The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A110393 Modified Look-and-Say sequence where 2 is the largest number that may be used. 1

%I

%S 1,11,21,1211,111221,21112211,1221112221,11222111221211,

%T 212212211122111221,121122112221112221112211,

%U 111221222122122111221221112221,2111221122121122112221112211222111221211

%N Modified Look-and-Say sequence where 2 is the largest number that may be used.

%C The ratio r(n) of the number of "1"s to the number of "2"s in the sequence converges to (4*phi^(3/2)+5*phi+sqrt(phi)+3) / (4*phi^(3/2)+5*phi+3*sqrt(phi)+3) = 0.890054... as n goes to infinity, where phi = (1+sqrt(5))/2 is the golden ratio. [From _Nathaniel Johnston_, Jan 13 2011]

%H N. Johnston, <a href="http://www.nathanieljohnston.com/2011/01/further-variants-of-the-look-and-say-sequence/">Further Variants of the "Look-and-Say" Sequence</a>

%Y Cf. A005150, A179999.

%K base,easy,nice,nonn

%O 0,2

%A Levi Kryder (seelevrun(AT)hotmail.com), May 11 2006

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 27 08:31 EST 2020. Contains 331293 sequences. (Running on oeis4.)