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A001619 Number of letters in English name for n increases at these numbers. 2
1, 3, 11, 13, 17, 21, 23, 73, 101, 103, 111, 113, 117, 121, 123, 173, 323, 373, 1103, 1111, 1113, 1117, 1121, 1123, 1173, 1323, 1373, 3323, 3373, 11373, 13323, 13373, 17373, 21373, 23323, 23373, 73373, 101173, 101323, 101373, 103323, 103373 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

"and" is used in number names and "-" is counted as a letter (e.g. "twenty-one" has more letters than "seventeen").

LINKS

Table of n, a(n) for n=1..42.

Sean A. Irvine, Number names for terms in the sequence

CROSSREFS

Sequence in context: A175820 A127209 A052362 * A071197 A191067 A052363

Adjacent sequences:  A001616 A001617 A001618 * A001620 A001621 A001622

KEYWORD

word,nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Missing terms added by Sean A. Irvine, Oct 04 2012

STATUS

approved

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Last modified April 18 11:35 EDT 2014. Contains 240707 sequences.