A164821 - OEIS

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A164821

Number of letters in n-th prime (in German).

4, 4, 4, 6, 3, 8, 8, 8, 14, 14, 13, 16, 13, 14, 16, 14, 14, 13, 16, 13, 14, 14, 14, 14, 16, 14, 14, 16, 14, 18, 26, 23, 26, 24, 24, 23, 26, 24, 26, 24, 24, 23, 23, 24, 26, 24, 14, 25, 27, 25, 25, 25, 24, 24, 27, 25, 25, 24, 27, 24, 25, 25, 17, 14, 19, 19, 24

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

OFFSET

1,1

COMMENTS

A letter with a diaeresis (for example 5 = "fünf" (not "fuenf")) or with an "ß" (in 30 = "dreißig" (not "dreissig")) is still counted as a single letter.

LINKS

Table of n, a(n) for n=1..67.

FORMULA

a(n) = A007208(A000040(n)). [R. J. Mathar, Oct 09 2010]

EXAMPLE

a(1) = 4 because the first prime is 2, and it has in the German language (zwei) 4 letters.

CROSSREFS

Cf. A000040, A007208.

Sequence in context: A241295 A074904 A010304 * A348677 A130331 A141241

Adjacent sequences: A164818 A164819 A164820 * A164822 A164823 A164824

KEYWORD

nonn,word

AUTHOR

Ivan Panchenko, Aug 27 2009

EXTENSIONS

a(11), a(12) corrected and more terms by Georg Fischer, Dec 19 2020

STATUS

approved