A141033 - OEIS

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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 (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: A071242 A044959 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`

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Last modified January 16 17:26 EST 2021. Contains 340206 sequences. (Running on oeis4.)