login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A141033 Numbers that cannot be formed by the concatenation of previous terms. 1
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, 100, 101, 121, 131, 141, 151, 161, 171, 181, 191, 200, 202, 212, 232, 242, 252, 262, 272, 282, 292, 300, 303, 313, 323, 343, 353, 363, 373, 383, 393, 400, 404 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Previous terms can appear in any order but can be used at most once. [From Paolo P. Lava, Mar 04 2010]

LINKS

Table of n, a(n) for n=1..51.

EXAMPLE

465 is not in the sequence because 4 U 6 U 5 -> 465

466 is not in the sequence because 4 U 66 -> 466

1313 is not in the sequence because 1 U 313 or 131 U 3 -> 1313

CROSSREFS

Cf. A141409.

Sequence in context: A275772 A071242 A044959 * A044821 A048307 A043713

Adjacent sequences:  A141030 A141031 A141032 * A141034 A141035 A141036

KEYWORD

nonn,base

AUTHOR

Paolo P. Lava and Giorgio Balzarotti, Jul 30 2008, Aug 04 2008

EXTENSIONS

Corrected by Paolo P. Lava, Mar 03 2010

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified June 29 01:51 EDT 2017. Contains 288856 sequences.