A000916 a(2n) = n+2, a(2n-1) = smallest number requiring n+2 letters in English.

1, 3, 4, 4, 3, 5, 11, 6, 15, 7, 13, 8, 17, 9, 24, 10, 23, 11, 73, 12, 3000, 13, 11000, 14, 15000, 15, 101, 16, 104, 17, 103, 18, 111, 19, 115, 20, 113, 21, 117, 22, 124, 23, 123, 24, 173, 25, 323, 26, 373, 27, 1104, 28, 1103, 29, 1111, 30

Offset: 1

Author

Jacques Haubrich (jhaubrich(AT)freeler.nl)

Keywords

• nonn
• word
• easy

Comments

Requires presence of "and" at appropriate place, e.g. "one hundred and one". - Sean A. Irvine, Aug 29 2011.

Crossrefs

Cf. A001166, A014388, A045494, A045495.

Extensions

More terms from Sean A. Irvine, Aug 28 2011