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

1,1

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

Links

Kyle Stern, Table of n, a(n) for n = 1..100

Wikipedia, Names of Large Numbers

Formula

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

Example

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

Prog

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

Crossrefs

Cf. A075774.

Sequence in context: A166649 A025145 A266963 * A278643 A069105 A159259

Adjacent sequences: A180958 A180959 A180960 * A180962 A180963 A180964

Keyword

easy,nonn,fini,word

Author

Kyle Stern, Sep 28 2010

Extensions

Corrected by Kyle Stern, Sep 30 2010

Status

approved