cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-4 of 4 results.

A291663 Numbers beginning with a vowel in Danish.

Original entry on oeis.org

1, 8, 11, 18, 21, 28, 31, 38, 41, 48, 51, 58, 61, 68, 71, 78, 81, 88, 91, 98, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 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
Offset: 1

Views

Author

Halfdan Skjerning, Aug 29 2017

Keywords

Comments

The sequence of words is: en, otte, elleve, atten, enogtyve, otteogtyve, enogtredive, otteogtredive, enogfyrre, otteogfyrre, enoghalvtreds, otteoghalvtreds, enogtreds, otteogtreds, enoghalvfjerds, ...

Links

Crossrefs

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

Programs

  • Mathematica
    Select[Range@ 149, With[{d = IntegerDigits@ #}, MemberQ[{1, 8}, If[Length@ d == 2, First@ Reverse@ d, First@ d]]] &] (* Michael De Vlieger, Aug 30 2017 *)

Formula

All numbers beginning with '1' or '8', except for two-digit numbers that do not end in '1' or '8'.

A247360 Numbers with French name ending in a consonant.

Original entry on oeis.org

1, 2, 3, 5, 6, 7, 8, 9, 10, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 31, 32, 33, 35, 36, 37, 38, 39, 41, 42, 43, 45, 46, 47, 48, 49, 51, 52, 53, 55, 56, 57, 58, 59, 61, 62, 63, 65, 66, 67, 68, 69, 70, 77, 78, 79, 80, 81, 82, 83, 85, 86, 87, 88, 89
Offset: 1

Views

Author

M. F. Hasler, Sep 14 2014

Keywords

Comments

Complement of A098060.

Examples

			The French name of the first terms are: uN, deuX, troiS, cinQ, siX, sepT, huiT, neuF, diX, dix-sepT, dix-huiT, dix-neuF, vingT, vingt-et-uN, ..., soixante-diX, soixante-dix-sepT, ...
Numbers not included are: zerO, quatrE, onzE, douzE, treizE, quatorzE, quinzE, seizE, vingt-quatrE, trentE, ... soixantE, soixante-quatrE, soixante-et-onzE, ...

Crossrefs

Cf. A247359, A000861 (English analog).

A291621 Numbers ending with a vowel in Danish.

Original entry on oeis.org

2, 3, 4, 8, 9, 10, 11, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 33, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 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, 200
Offset: 1

Views

Author

Halfdan Skjerning, Aug 28 2017

Keywords

Comments

The sequence of words is: to, tre, fire, otte, ni, ti, elleve, tyve, enogtyve, toogtyve, treogtyve, ...
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"].
All numbers ending with 02, 03, 04, 08, 09, 10, 3n, 4n, n00, or n000 will end in a vowel.
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.

Links

Crossrefs

Cf. A000861, A079741, A098060, A247751.

Formula

All numbers ending with 02, 03, 04, 08, 09, 10, 3n, 4n, n00, n000.

A291664 Numbers beginning and ending with a vowel in Danish.

Original entry on oeis.org

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
Offset: 1

Views

Author

Halfdan Skjerning, Aug 29 2017

Keywords

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

Crossrefs

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

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.
Showing 1-4 of 4 results.

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