A180961 Numbers such that the American English name of the number has four syllables.

27, 37, 47, 57, 67, 71, 72, 73, 74, 75, 76, 78, 79, 87, 97, 101, 102, 103, 104, 105, 106, 108, 109, 110, 112, 201, 202, 203, 204, 205, 206, 208, 209, 210, 212, 301, 302, 303, 304, 305, 306, 308, 309, 310, 312, 401, 402, 403, 404, 405, 406, 408, 409, 410, 412

Offset: 1

Author

Kyle Stern, Sep 28 2010

Keywords

• easy
• nonn
• fini
• word

Comments

There are a finite number of terms, considering all terms up to 10^66 using English names of large numbers and various conventional extensions thereof (see Wikipedia link). - Michael S. Branicky, May 27 2024

Examples

			27 = "twen-ty sev-en", 101 = "one hun-dred one"
		

Links

• Kyle Stern, Table of n, a(n) for n = 1..100
• Wikipedia, Names of Large Numbers

Crossrefs

Cf. A075774.

Programs

Python

# uses function in A075774
print([k for k in range(500) if A075774(k) == 4]) # Michael S. Branicky, May 27 2024

Formula

A075774(a(n)) = 4. - Michael S. Branicky, May 27 2024

Extensions

Corrected by Kyle Stern, Sep 30 2010