A164797 a(n) is the smallest number whose English name has the letter "u" in the n-th position, or -1 if no such number exists.

-1, -1, 4, 1000000000000000000000000000000000000, 100, 400, 300, 44, 24, 74, 15000, 13000, 104, 404, 304, 4004, 1100, 144, 124, 174, 324, 374, 3024, 3074, 1104, 1404, 3404, 3304, 1144, 1124, 1174, 1324, 1374, 3324, 3374, 11374, 13324, 13374, 17374, 23324, 23374

Offset

1,3

Links

Table of n, a(n) for n=1..41.

Wikipedia, Names for large numbers.

Example

a(3)=4 ("foUr"), a(5)=100 ("onehUndred"), a(4)=10^36 ("oneUndecillion").

Crossrefs

Cf. A164789 ("o"), A164790 ("e"), A164791 ("n"), A164792 ("t").

Cf. A164793 ("i"), A164794 ("f"), A164795 ("h"), A164796 ("r").

Sequence in context: A066546 A132653 A115544 * A336587 A336586 A241471

Adjacent sequences: A164794 A164795 A164796 * A164798 A164799 A164800

Keyword

word,sign

Author

Claudio Meller, Aug 26 2009

Extensions

a(4) corrected, and a(27) and beyond from Michael S. Branicky, Feb 02 2021

Status

approved