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A117304 Numbers with an even number of digits such that the second half is twice the first half. 0
12, 24, 36, 48, 1020, 1122, 1224, 1326, 1428, 1530, 1632, 1734, 1836, 1938, 2040, 2142, 2244, 2346, 2448, 2550, 2652, 2754, 2856, 2958, 3060, 3162, 3264, 3366, 3468, 3570, 3672, 3774, 3876, 3978, 4080, 4182, 4284, 4386, 4488, 4590, 4692, 4794, 4896 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..42.

EXAMPLE

1020 is in the sequence because 20=2*10

CROSSREFS

Sequence in context: A141766 A069056 A019550 * A022759 A091193 A174018

Adjacent sequences:  A117301 A117302 A117303 * A117305 A117306 A117307

KEYWORD

base,easy,nonn

AUTHOR

Luc Stevens (lms022(AT)yahoo.com), Apr 26 2006

STATUS

approved

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Last modified May 24 00:38 EDT 2019. Contains 323528 sequences. (Running on oeis4.)