A372807 Numbers whose American English name has exactly three syllables.

11, 17, 21, 22, 23, 24, 25, 26, 28, 29, 31, 32, 33, 34, 35, 36, 38, 39, 41, 42, 43, 44, 45, 46, 48, 49, 51, 52, 53, 54, 55, 56, 58, 59, 61, 62, 63, 64, 65, 66, 68, 69, 70, 81, 82, 83, 84, 85, 86, 88, 89, 91, 92, 93, 94, 95, 96, 98, 99, 100, 200, 300, 400, 500, 600, 800, 900

Offset

1,1

Comments

There are 107 terms, considering all terms up to 10^66 using English names of large numbers and various conventional extensions thereof (see Wikipedia link), since quadrillion, quintillion, etc. each have three or more syllables themselves. Terms like "one googol" (or possibly "a googol"), "two googol," ..., "twelve googol" are unconventional, hence disallowed. - Michael S. Branicky, May 28 2024

Links

Michael S. Branicky, Table of n, a(n) for n = 1..107

Wikipedia, Names of Large Numbers

Formula

A075774(a(n)) = 3. - Michael S. Branicky, May 27 2024

Example

a(2) = 17 is the second number whose name in American English has exactly three syllables: "seventeen".

Prog

(Python) # uses function in A075774
print([k for k in range(501) if A075774(k) == 3]) # Michael S. Branicky, May 27 2024

Crossrefs

Cf. A075774, A180961.

Sequence in context: A362083 A322476 A176603 * A325902 A050715 A006618

Adjacent sequences: A372804 A372805 A372806 * A372808 A372809 A372810

Keyword

nonn,easy,fini,full,word,less

Author

Marc Groz, May 13 2024

Status

approved