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A248038
3n concatenated with itself.
1
33, 66, 99, 1212, 1515, 1818, 2121, 2424, 2727, 3030, 3333, 3636, 3939, 4242, 4545, 4848, 5151, 5454, 5757, 6060, 6363, 6666, 6969, 7272, 7575, 7878, 8181, 8484, 8787, 9090, 9393, 9696, 9999, 102102, 105105, 108108, 111111, 114114, 117117, 120120, 123123
OFFSET
1,1
MATHEMATICA
#*10^IntegerLength[#]+#&/@(3*Range[50]) (* Harvey P. Dale, Jan 14 2019 *)
CROSSREFS
Sequence in context: A071595 A225707 A225511 * A032661 A256029 A055078
KEYWORD
nonn,base,easy
AUTHOR
Larry Guindine, Sep 30 2014
EXTENSIONS
Definition edited by N. J. A. Sloane, Sep 30 2014
More terms from Alois P. Heinz, Sep 30 2014
STATUS
approved