OFFSET
1,1
EXAMPLE
a(4) = 34 because with the letters of 34 (treinta y cuatro) we can spell these numbers: 1 (uno), 4 (cuatro), 11 (once) and 30 (treinta). Note that we can also write 40 cuarenta, but 40 is bigger than 34 so it does not count.
CROSSREFS
KEYWORD
nonn,word,more
AUTHOR
Claudio Meller, Jul 27 2018
STATUS
approved