login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A126803 Integers that die when submitted to the rules of the Game of Life. Design of the digits is shown below. 2
8, 10, 11, 14, 18, 20, 31, 48, 50, 81, 83, 87, 88, 101, 118, 122, 127, 144, 148, 155, 157, 161, 174, 181, 188, 191, 199, 202, 205, 206, 208, 218, 221, 222, 228, 245, 247, 248, 274, 278, 284, 285, 295, 302, 304, 305, 308, 309, 312, 313, 315, 323, 327, 331, 342 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Here's the font that's used; a single empty column is used between adjacent digits. The same digit design was selected 39 years ago by Jonathan Vos Post.
ooo.o.ooo.ooo.o.o.ooo.ooo.ooo.ooo.ooo
o.o.o...o...o.o.o.o...o.....o.o.o.o.o
o.o.o.ooo.ooo.ooo.ooo.ooo...o.ooo.ooo
o.o.o.o.....o...o...o.o.o...o.o.o...o
ooo.o.ooo.ooo...o.ooo.ooo...o.ooo.ooo
The sequence is infinite; e.g., any number whose decimal expansion begins and ends with 14 and contains only the digits 1, 4 and 8 dies in 9 generations. It has density zero, because any number containing the digit string 14405930 emits a lightweight spaceship which can't be stopped by whatever the rest of the number produces.
LINKS
Eric Angelini and Dean Hickerson, Feb 22 2007, Table of n, a(n) for n = 1..111
Eric Angelini, Une suite pour la Vie
E. Angelini, Une suite pour la Vie [Cached, with permission]
Paul Callahan, Game of Life applet and description, The World of Math Online
Dean Hickerson, Digits in Life.
CROSSREFS
Sequence in context: A031037 A006757 A265200 * A256385 A274560 A122990
KEYWORD
base,nonn
AUTHOR
Eric Angelini and Dean Hickerson, Feb 22 2007
EXTENSIONS
Edited by Dean Hickerson, Mar 02 2007
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 09:32 EDT 2024. Contains 371268 sequences. (Running on oeis4.)