A158354 a(n) is the smallest number whose name in UK English contains n vowels.

2, 1, 11, 14, 71, 102, 101, 111, 114, 171, 1071, 1101, 1111, 1114, 1171, 11171, 14171, 71171, 101114, 101171, 111171, 114171, 171171, 1101114, 1101171, 1111171, 1114171, 1171171, 11171171, 14171171, 71171171, 101114171, 101171171, 111171171, 114171171, 171171171

Offset

1,1

Comments

In UK English, "102" is written as "one hundred and two".

twO has 1 vowel, OnE has 2, ElEvEn has 3, fOUrtEEn has 4, sEvEntY OnE has 5, OnE hUndrEd And twO has 6, OnE hUndrEd And OnE has 7, OnE hUndrEd And ElEvEn has 8.

Links

Table of n, a(n) for n=1..36.

Wiktionary, one hundred one (US)

Wiktionary, one hundred and one (UK)

Prog

(Python)
from num2words import num2words
from itertools import count, islice
def vowels(n): return sum(1 for c in num2words(n) if c in "aeiouy")
def agen():
    n, adict = 1, dict()
    for k in count(1):
        v = vowels(k)
        if v not in adict: adict[v] = k
        while n in adict: yield adict[n]; n += 1
print(list(islice(agen(), 23))) # Michael S. Branicky, Aug 09 2022

Crossrefs

Sequence in context: A088587 A305711 A158352 * A055459 A080958 A138351

Adjacent sequences: A158351 A158352 A158353 * A158355 A158356 A158357

Keyword

nonn,word

Author

Rodolfo Kurchan, Mar 16 2009

Extensions

Edited by Jon E. Schoenfield, Oct 06 2018

a(10) and beyond from Michael S. Branicky, Aug 09 2022

Status

approved