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A117640 Concatenation of first n numbers in base 4. 1
1, 12, 123, 12310, 1231011, 123101112, 12310111213, 1231011121320, 123101112132021, 12310111213202122, 1231011121320212223, 123101112132021222330, 12310111213202122233031 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Concatenation of the first n terms of A007090.

Quaternary analog of A058935.

LINKS

Table of n, a(n) for n=1..13.

CROSSREFS

Cf. A030373, A048436.

Sequence in context: A083429 A226737 A077306 * A074158 A071269 A061088

Adjacent sequences:  A117637 A117638 A117639 * A117641 A117642 A117643

KEYWORD

base,easy,nonn

AUTHOR

Jonathan Vos Post, Apr 27 2006

EXTENSIONS

Edited by Jason Kimberley, Nov 27 2012

STATUS

approved

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Last modified April 8 14:52 EDT 2020. Contains 333314 sequences. (Running on oeis4.)