Any Chinese dictionary.
Table of n, a(n) for n=0..100.
Felix Fröhlich, Table of n, a(n), pinyin for n = 0..100
Omniglot, Numbers in Mandarin Chinese.
Wikipedia, Chinese numerals.
Index entries for sequences related to number of letters in n
a(21) = 7 because the Chinese word for 21 is, in the official romanization (pinyin), "er shi yi", which has seven letters.
Cf. A112348, A112350, A030166.
Sequence in context: A058634 A037919 A049849 * A231821 A062072 A140395
Adjacent sequences: A112346 A112347 A112348 * A112350 A112351 A112352
Wei Ji Ma (weijima(AT)gmail.com), Sep 05 2005
Name clarified by Felix Fröhlich, Jan 15 2017