A045494 Smallest positive integer requiring at least n letters (not including hyphens) when spelled out in English.

1, 1, 1, 3, 3, 11, 13, 13, 17, 23, 23, 73, 101, 103, 103, 111, 113, 113, 117, 123, 123, 173, 323, 373, 1103, 1103, 1111, 1113, 1113, 1117, 1123, 1123, 1173, 1323, 1373, 3323, 3373, 11373, 13323, 13373, 17373, 23323, 23373, 73373, 101373, 103323

Offset: 1

Author

Brian Galebach

Keywords

• nonn
• word

Comments

Assumes British definition of billion, trillion. Also assumes no 'and' is used to spell integers.

Crossrefs

Cf. A000916, A001166, A014388, A045494, A045495, A045495, A167509.

Extensions

Added "at least" in definition M. F. Hasler, Nov 18 2009