A Portuguese sequence of integers
Wolfram Language (Mathematica), 42 bytes
Of course there is a built-in for this...
And as @Charlie mentioned we can golf &quot;Portuguese&quot; to &quot;Spanish&quot; and save 3 bytes
#~IntegerName~&quot;Spanish&quot;~StringTake~1==&quot;d&quot;&amp;

Try all test cases
-13 bytes from @att