A195526 Numbers written with two Roman numerals.

2, 4, 6, 9, 11, 15, 20, 40, 51, 55, 60, 90, 101, 105, 110, 150, 200, 400, 501, 505, 510, 550, 600, 900, 1001, 1005, 1010, 1050, 1100, 1500, 2000

Offset: 1

Author

Kausthub Gudipati, Sep 20 2011

Keywords

• nonn
• base
• fini
• full
• easy
• less

Comments

The second group of numbers in A003587.

Examples

			2=II. 4=IV. 6=VI. 9=IX. 11=XI. 15=XV.