A248038 3n concatenated with itself.

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

Links

Table of n, a(n) for n=1..41.

Mathematica

#*10^IntegerLength[#]+#&/@(3*Range[50]) (* Harvey P. Dale, Jan 14 2019 *)

Crossrefs

Sequence in context: A071595 A225707 A225511 * A032661 A256029 A055078

Adjacent sequences: A248035 A248036 A248037 * A248039 A248040 A248041

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