OFFSET
1,1
COMMENTS
The 'ij' in 'vijf' (five) has been counted as two letters here, as in A090589.
FORMULA
a(n) = A090589(prime(n)). - Michel Marcus, Sep 05 2013
EXAMPLE
a(1) = 4 because the first prime is 2, and it has in the Dutch language (twee) 4 letters.
CROSSREFS
KEYWORD
nonn,word,more
AUTHOR
Ivan Panchenko, Aug 28 2009
EXTENSIONS
a(21)-a(25) from Charles R Greathouse IV, Aug 26 2017
a(26)-a(60) from J.W.L. (Jan) Eerland, Jun 27 2023
STATUS
approved