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Number of letters in n (in Dutch).
(Formerly M2299)
+10
1
3, 4, 4, 4, 3, 3, 5, 4, 5, 4, 3, 6, 7, 8, 7, 7, 9, 8, 9, 7, 12, 13, 13, 13, 12, 12, 14, 13, 14, 6, 11, 12, 12, 12, 11, 11, 13, 12, 13, 7, 12, 13, 13, 13, 12, 12, 14, 13, 14, 6, 11, 12, 12, 12, 11, 11, 13, 12, 13, 6, 11, 12, 12, 12, 11, 11, 13, 12, 13, 8, 13
COMMENTS
The 'ij' in 'vijf' has been counted as one letter here. Counting it as one or two letters are both common in Dutch. - André Engels, Dec 07 2003
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
CROSSREFS
A090589 gives the sequence when 'ij' is counted as two letters.
Position of the first letter of n (in Dutch) in the alphabet.
+10
1
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
EXAMPLE
'Een' (Dutch for 'one') begins with 'E', the fifth letter of the alphabet, hence a(1)=5.
MATHEMATICA
a[n_] := LetterNumber @ Characters[IntegerName[n, {"Dutch", "Ordinal"}]][[1]]; Array[a, 100, 0] (* Amiram Eldar, Jan 18 2020 *)
PROG
(Python)
from num2words import num2words
import unidecode
return ord(unidecode.unidecode(num2words(n, lang='nl')).lower()[0]) - 96 # Chai Wah Wu, Feb 27 2020
Number of letters in n-th prime (in Dutch).
+10
0
4, 4, 4, 5, 3, 7, 9, 9, 13, 14, 11, 13, 12, 13, 14, 13, 14, 11, 13, 13, 14, 15, 13, 14, 15, 10, 11, 12, 12, 14, 21, 18, 20, 20, 21, 19, 21, 19, 20, 21, 22, 19, 20, 21, 22, 22, 14, 24, 25, 25, 23, 24, 23, 23, 23, 24, 24, 26, 23, 26, 23
COMMENTS
The 'ij' in 'vijf' (five) has been counted as two letters here, as in A090589.
EXAMPLE
a(1) = 4 because the first prime is 2, and it has in the Dutch language (twee) 4 letters.
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