A141033 Numbers that cannot be formed by the concatenation of previous terms.

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

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

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: A044959 A353181 A306273 * A044821 A297148 A048307

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