A161377 -id:A161377 - cp's OEIS frontend

A277685 Position of first letter of n (in Portuguese) in alphabet.

26, 21, 4, 20, 17, 3, 19, 19, 15, 14, 4, 15, 4, 20, 17, 17, 4, 4, 4, 4, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 19, 19, 19, 19, 19, 19

Offset: 0

João M. de Medeiros, Oct 26 2016

Fourteen has two spellings in Portuguese: "quatorze" and "catorze". I chose the first one because it's the most used.

			"Um" -- Portuguese for one -- begins with U, which is the 21st letter in the alphabet, so a(1)=21.

João M. de Medeiros, Table of n, a(n) for n = 0..999

Cf. A005606, A161377.

from num2words import num2words
import unidecode
def A277685(n): # output differs from sequence at n=14 due to multiple spellings.
    return ord(unidecode.unidecode(num2words(n, lang='pt')).lower()[0]) - 96 # Chai Wah Wu, Feb 27 2020

A331482 Position of the first letter of n (in Dutch) in the alphabet.

Original entry on oeis.org

14, 5, 20, 4, 22, 22, 26, 26, 1, 14, 20, 5, 20, 4, 22, 22, 26, 26, 1, 14, 20, 5, 20, 4, 22, 22, 26, 26, 1, 14, 4, 5, 20, 4, 22, 22, 26, 26, 1, 14, 22, 5, 20, 4, 22, 22, 26, 26, 1, 14, 22, 5, 20, 4, 22, 22, 26, 26, 1, 14, 26, 5, 20, 4, 22, 22, 26, 26, 1, 14, 26

Offset: 0

J. Marcel Feenstra, Jan 18 2020

			'Een' (Dutch for 'one') begins with 'E', the fifth letter of the alphabet, hence a(1)=5.

Wikibooks, Rekenen/Natuurlijke getallen

Cf. A005606 (English), A161377 (Spanish), A277685 (Portuguese).

Cf. other Dutch sequences: A090589, A247802.

a[n_] := LetterNumber @ Characters[IntegerName[n, {"Dutch","Ordinal"}]][[1]]; Array[a, 100, 0] (* Amiram Eldar, Jan 18 2020 *)

from num2words import num2words
import unidecode
def A331482(n):
    return ord(unidecode.unidecode(num2words(n, lang='nl')).lower()[0]) - 96 # Chai Wah Wu, Feb 27 2020

cp's OEIS Frontend

A277685 Position of first letter of n (in Portuguese) in alphabet.

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