A164793 a(n) is the smallest number whose English name has the letter "i" in the n-th position, or -1 if no such number exists.

-1, 5, 13, -1, 1000000, 4000000, 45, 25, 75, 13000000, 17000000, 105, 113, 305, 313, 3013, 145, 125, 175, 325, 375, 3075, 1105, 1113, 1305, 1313, 3305, 1145, 1125, 1175, 1325, 1375, 3325, 3375, 11375, 13325, 13375, 17375, 23325, 23375, 73375, 101375, 103325

Offset

1,2

Comments

Original definition used "-2 for infinite".

Links

Table of n, a(n) for n=1..43.

Example

a(2)=5 ("fIve"), a(3)=13 ("thIrteen"), a(5)=10^6 ("onemIllion").

Crossrefs

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

Cf. A164794 ("f"), A164795 ("h"), A164796 ("r"), A164797 ("u").

Sequence in context: A245776 A025580 A073878 * A065934 A282063 A035412

Adjacent sequences: A164790 A164791 A164792 * A164794 A164795 A164796

Keyword

word,sign

Author

Claudio Meller, Aug 26 2009

Extensions

a(11) and beyond from Michael S. Branicky, Feb 02 2021

Name changed to remove "-2" (see Comments), and a(1) and a(4) changed from -2 to -1 by Jon E. Schoenfield, Feb 02 2021

Status

approved