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

Author

Marc Groz, May 13 2024

Keywords

• nonn
• easy
• fini
• full
• word
• less

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

Examples

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

Links

• Michael S. Branicky, Table of n, a(n) for n = 1..107
• Wikipedia, Names of Large Numbers

Crossrefs

Cf. A075774, A180961.

Programs

Python

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

Formula

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