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

Author

Anonymous submission

Keywords

• fini
• sign
• full
• word

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

Examples

			C first occurs in "octillion".
		

Links

• Jeff Miller, A Collection of Word Oddities and Trivia

Crossrefs

Differs from A111098 because "zero" is not permitted.

Cf. A114181.

Programs

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 *)

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