A164796 a(n) is the smallest number whose English name has the letter "r" in the n-th position, or -1 if no such number exists.

-1, -1, 0, 4, 1000000000000, 4000000000000, 3000000000000, 43, 23, 24, 74, 24000000000000, 103, 104, 303, 304, 3004, 143, 123, 124, 174, 324, 374, 1103, 1104, 1303, 1304, 3303, 1143, 1123, 1124, 1174, 1324, 1374, 3324, 3374, 11374, 13324, 13374, 17374, 23324

Offset

1,4

Links

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

Example

a(3)=0 ("zeRo"), a(4)=4 ("fouR"), a(5)=1000000000000 ("onetRillion"), a(13)=103 ("onehundredthRee").

Crossrefs

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

Cf. A164793 ("i"), A164794 ("f"), A164795 ("h"), A164797 ("u").

Sequence in context: A066545 A161405 A147876 * A324441 A004231 A266200

Adjacent sequences: A164793 A164794 A164795 * A164797 A164798 A164799

Keyword

word,sign

Author

Claudio Meller, Aug 26 2009

Extensions

a(24) and beyond from Michael S. Branicky, Feb 02 2021

Status

approved