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

1,1

Comments

The second group of numbers in A003587.

Links

Table of n, a(n) for n=1..31.

Example

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

Crossrefs

Sequence in context: A038107 A303331 A233776 * A153196 A247185 A237685

Adjacent sequences: A195523 A195524 A195525 * A195527 A195528 A195529

Keyword

nonn,base,fini,full,easy,less

Author

Kausthub Gudipati, Sep 20 2011

Status

approved