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Number of letters in n-th prime (in German).
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%I #13 Dec 19 2020 07:51:16

%S 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,

%T 14,14,16,14,18,26,23,26,24,24,23,26,24,26,24,24,23,23,24,26,24,14,25,

%U 27,25,25,25,24,24,27,25,25,24,27,24,25,25,17,14,19,19,24

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

%C 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.

%F a(n) = A007208(A000040(n)). [_R. J. Mathar_, Oct 09 2010]

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

%Y Cf. A000040, A007208.

%K nonn,word

%O 1,1

%A _Ivan Panchenko_, Aug 27 2009

%E a(11), a(12) corrected and more terms by _Georg Fischer_, Dec 19 2020