OFFSET
3,2
COMMENTS
a(6) = 15 = "quince" (6 letters); 4 = "cuatro" also has 6 letters but is smaller than 5 = a(5) and this sequence is strictly increasing.
Spaces are not counted, so, e.g., "ciento tres" and "doscientos cuatro" are treated as a 10-letter word and a 16-letter word, respectively.
LINKS
EXAMPLE
a( 3) = 1 for the 3-letter word "uno";
a( 4) = 3 for the 4-letter word "tres";
a( 5) = 5 for the 5-letter word "cinco";
a( 6) = 15 for the 6-letter word "quince";
a( 7) = 30 for the 7-letter word "treinta";
a( 8) = 40 for the 8-letter word "cuarenta";
a( 9) = 50 for the 9-letter word "cincuenta";
a(10) = 103 for the 10-letter word "cientotres";
...
a(16) = 204 for the 16-letter word "doscientoscuatro";
....
CROSSREFS
KEYWORD
nonn,word,less
AUTHOR
Rodolfo Kurchan, Jul 08 2015
STATUS
approved