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A141033 Numbers that cannot be formed by the concatenation of previous terms. 2
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. - Paolo P. Lava, Mar 04 2010
LINKS
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: A044959 A353181 A306273 * A044821 A297148 A048307
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

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Last modified April 14 03:49 EDT 2024. Contains 371655 sequences. (Running on oeis4.)