

A089590


Uban numbers (the letter u is banned from the English name of the number).


8



0, 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 75, 76, 77, 78, 79, 80, 81, 82, 83, 85, 86, 87, 88, 89, 90, 91, 92, 93, 95, 96, 97, 98, 99
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OFFSET

1,3


COMMENTS

The sequence of uban numbers first differs from A052406 (the numbers not containing the digit 4) at the term 40 (forty), which is a uban number but is not 4less.


LINKS

Daniel Arribas and Reinhard Zumkeller, Table of n, a(n) for n = 1..1000 (first 89 terms from Daniel Arribas)
Roel and Bas van Dijk, Numerals package, Hackage (Haskell packages)
Eric Weisstein's World of Mathematics, Uban Number
Index entries for sequences related to number of letters in n


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
a089590 n = a089590_list !! (n1)
a089590_list = filter (T.all (/= 'u') . numeral) [0..] where
numeral :: Integer > Text
numeral = fromJust . EN.gb_cardinal defaultInflection
 Reinhard Zumkeller, Jan 23 2015


CROSSREFS

Cf. A052406.
Cf. A006933 (ban e), A089589 (ban i), A008521 (ban o), A008523 (ban t).
Sequence in context: A242410 A258022 A333638 * A052406 A022306 A183298
Adjacent sequences: A089587 A089588 A089589 * A089591 A089592 A089593


KEYWORD

nonn,easy,word


AUTHOR

Eric W. Weisstein, Nov 09 2003


EXTENSIONS

a(1) = 0 prepended by Reinhard Zumkeller, Jan 23 2015


STATUS

approved



