A029722 Smallest positive integer containing the n-th letter of the alphabet (in US English), or -1 if no such integer exists.

1000, 1000000000, 1000000000000000000000000000, 100, 1, 4, 8, 3, 5, -1, -1, 11, 1000000, 1, 1, 1000000000000000000000000, 1000000000000000, 3, 6, 2, 4, 5, 2, 6, 20, -1

Offset

1,1

Comments

This uses the short scale for the names of large numbers. - Ken Takusagawa, Oct 11 2016

In British English, a(1) is 101. - Paul Duckett, Apr 23 2022

Links

Table of n, a(n) for n=1..26.

Jeff Miller, A Collection of Word Oddities and Trivia

Example

C first occurs in "octillion".

Mathematica

alphabet={"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"};
candidates=AppendTo[AppendTo[Range[19], Table[10*i, {i, 2, 10}]], Table[10^i, {i, 3, 63, 3}]]//Flatten//Quiet;
f[10]=f[11]=f[26]=-1; f[n_]:=Module[{k=1},
While[StringContainsQ[ToString[IntegerName[candidates[[k]], "Words"]], alphabet[[n]]]!=True, k++]; candidates[[k]]];
f/@Range[26] (* Ivan N. Ianakiev, Apr 10 2018 *)

Crossrefs

Differs from A111098 because "zero" is not permitted.

Cf. A114181.

Sequence in context: A013793 A013856 A111098 * A282638 A283014 A283058

Adjacent sequences: A029719 A029720 A029721 * A029723 A029724 A029725

Keyword

fini,sign,full,word

Author

Anonymous submission.

Extensions

a(5) corrected by Donovan Johnson, Dec 08 2004

Edited: Definition extended, "octillian" corrected, link and cross-reference provided; and sequence completed by Rick L. Shepherd, Aug 29 2009

Definition clarified by Paul Duckett, Apr 23 2022

Status

approved