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A166874 Numbers with vertical symmetry when expressed as Roman numerals. 2
1, 2, 3, 5, 10, 19, 20, 30, 1000, 2000, 3000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A237250 A283314 A078715 * A046630 A177874 A293353
KEYWORD
nonn
AUTHOR
Claudio Meller, Oct 22 2009
EXTENSIONS
Edited by N. J. A. Sloane, Oct 25 2009
STATUS
approved

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Last modified March 19 01:34 EDT 2024. Contains 370952 sequences. (Running on oeis4.)