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A166874 Numbers with vertical symmetry when expressed as Roman numerals. 2

%I #3 May 01 2013 21:13:45

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

%N Numbers with vertical symmetry when expressed as Roman numerals.

%K nonn

%O 1,2

%A _Claudio Meller_, Oct 22 2009

%E Edited by _N. J. A. Sloane_, Oct 25 2009

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Last modified May 15 09:20 EDT 2024. Contains 372540 sequences. (Running on oeis4.)