A072685 Positive integers whose English names contain a prime number of letters.

1, 2, 3, 6, 7, 8, 10, 15, 16, 23, 27, 28, 33, 37, 38, 40, 50, 60, 70, 74, 75, 79, 83, 87, 88, 93, 97, 98, 104, 105, 109, 111, 112, 120, 124, 125, 129, 130, 134, 135, 139, 143, 147, 148, 153, 157, 158, 163, 167, 168, 171, 172, 176, 180, 184, 185, 189, 190, 194, 195

Offset: 1

Author

Mark Hudson (mrmarkhudson(AT)hotmail.com), Jul 02 2002

Keywords

• easy
• nonn
• word

Examples

			First value is 1 because 1 -> "ONE" -> 3 letters and 3 is prime. Numbers >100 use naming convention using "and": 199 -> "ONEHUNDREDANDNINETYNINE" -> 23 letters and 23 is prime.