OFFSET
1,3
COMMENTS
Blind numbers. - Cino Hilliard, May 03 2004
There are 30276 terms, ending in 777777. - Michael S. Branicky, Aug 04 2022
LINKS
Michael S. Branicky, Table of n, a(n) for n = 1..30276 (full sequence; terms 1..10000 from Reinhard Zumkeller)
Roel and Bas van Dijk, Numerals package, Hackage (Haskell packages).
Eric Weisstein's World of Mathematics, Iban Number
Wikipedia, Names of Large Numbers
PROG
(Haskell)
import Data.Maybe (fromJust)
import Data.Text (Text); import qualified Data.Text as T (all)
import Text.Numeral.Grammar.Reified (defaultInflection)
import qualified Text.Numeral.Language.EN as EN -- see link
a089589 n = a089589_list !! (n-1)
a089589_list = filter (T.all (/= 'i') . numeral) [0..] where
numeral :: Integer -> Text
numeral = fromJust . EN.gb_cardinal defaultInflection
-- Reinhard Zumkeller, Jan 23 2015
(Python)
from itertools import islice
from num2words import num2words
def agen(): yield from (k for k in range(10**6) if "i" not in num2words(k))
print(list(islice(agen(), 60))) # Michael S. Branicky, Aug 04 2022
CROSSREFS
KEYWORD
nonn,easy,word,fini,full
AUTHOR
Eric W. Weisstein, Nov 09 2003
STATUS
approved