2,10,12,16,17,18,19,200,201,202,...299,2000,...

This is the sequence of counting numbers which 
when spelled in the Portuguese language, begin 
with the letter "d":

 1=um, 
 2=dois,            <-begins with "d" 
 3=três, 
 4=quatro, 
 5=cinco, 
 6=seis, 
 7=sete, 
 8=oito, 
 9=nove, 
10=dez,              <-begins with "d"
11=onze, 
12=doze,             <-begins with "d"
13=treze, 
14=catorze, 
15=quinze, 
16=dezesseis,        <-begins with "d" 
17=dezessete,        <-begins with "d" 
18=dezoito,          <-begins with "d"
19=dezenove,         <-begins with "d"
20=vinte, 
21=vinte e um, 
22=vinte e dois, 
etc.
30=trinta
etc.
40=quarenta,,
etc.
etc.
100=o suta
etc.
200=doua sute         <-begins with "d"
etc.
299=duzentos noventa e nove   <-begins with "d"
2000=doi mie una      <-begins with "d"

Edwin