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

Author

Rodolfo Kurchan, Mar 16 2009

Keywords

• nonn
• word

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

• Wiktionary, one hundred one (US)
• Wiktionary, one hundred and one (UK)

Programs

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

Extensions

Edited by Jon E. Schoenfield, Oct 06 2018

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