A291664 - OEIS

A291664

Numbers beginning and ending with a vowel in Danish.

8, 11, 21, 28, 31, 38, 41, 48, 100, 102, 103, 104, 108, 109, 110, 111, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 802, 803, 804, 808, 809, 811, 820, 821, 822, 823, 824, 825, 826

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

The sequence of words is: otte, elleve, enogtyve, otteogtyve, enogtredive, otteogtredive.

In Danish, when pronouncing a two-digit number, the last number is mentioned first; for example, '21' is "enogtyve" ["one-and-twenty"], and '121' is "ethundredeogenogtyve" ["one-hundred-and-one-and-twenty"].

Please note that '100' can be both spelled and pronounced as "hundrede", "ethundrede", "hundred" and "ethundred"; similarly, '1000' can be spelled "tusinde", "ettusinde", "tusind" and "ettusind". The "et" in "ethundrede" is often omitted in daily speech.

Intersection of A291621 and A291663. - Iain Fox, Oct 17 2017

LINKS

Table of n, a(n) for n=1..59.

Brady Haran and Tom Scott, 58 and other Confusing Numbers, Numberphile video (2015)

Wikipedia, List of numbers in various languages

FORMULA

All numbers beginning with '1' or '8', except for two-digit numbers that do not end in '1' or '8', and that also end with 02, 03, 04, 08, 09, 10, 3n, 4n, n00, or n000 will begin and end with a vowel.

CROSSREFS

Cf. A000861, A079741, A098060, A247751, A291621, A291663.

Sequence in context: A129730 A347757 A368356 * A318347 A195160 A053701

Adjacent sequences: A291661 A291662 A291663 * A291665 A291666 A291667

KEYWORD

nonn,word

AUTHOR

Halfdan Skjerning, Aug 29 2017

STATUS

approved