A166874 Numbers with vertical symmetry when expressed as Roman numerals.

1, 2, 3, 5, 10, 19, 20, 30, 1000, 2000, 3000

Offset

1,2

Links

Table of n, a(n) for n=1..11.

Crossrefs

Sequence in context: A237250 A283314 A078715 * A046630 A177874 A293353

Adjacent sequences: A166871 A166872 A166873 * A166875 A166876 A166877

Keyword

nonn

Author

Claudio Meller, Oct 22 2009

Extensions

Edited by N. J. A. Sloane, Oct 25 2009

Status

approved