A117383 Positive numbers whose Spanish names do not include repeated letters.

1, 2, 3, 4, 10, 11, 12, 15, 80, 100, 1000, 1001, 1002, 1003, 1004, 1011, 1012, 1080, 2000, 3000, 3001, 4000, 11000, 12000, 80000

Offset

1,2

Links

Table of n, a(n) for n=1..25.

Prog

(Python)
from num2words import num2words as n2w
def letters(n):
    return "".join(c for c in n2w(n, lang='es') if c.isalpha())
def ok(n):
    w = letters(n)
    return len(w) == len(set(w))
print([k for k in range(1, 100000) if ok(k)]) # Michael S. Branicky, Jun 08 2022

Crossrefs

Cf. A059916, A354681.

Sequence in context: A007091 A058185 A080897 * A047455 A336193 A202426

Adjacent sequences: A117380 A117381 A117382 * A117384 A117385 A117386

Keyword

fini,full,nonn,word

Author

Rodolfo Kurchan, Apr 24 2006

Status

approved