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 A190321 Number of nonzero digits when writing n in base where place values are squares, cf. A007961. 4
 0, 1, 1, 1, 1, 2, 2, 2, 1, 1, 2, 2, 2, 2, 3, 3, 1, 2, 2, 2, 2, 3, 3, 3, 2, 1, 2, 2, 2, 2, 3, 3, 3, 2, 2, 3, 1, 2, 2, 2, 2, 3, 3, 3, 2, 2, 3, 3, 3, 1, 2, 2, 2, 2, 3, 3, 3, 2, 2, 3, 3, 3, 3, 4, 1, 2, 2, 2, 2, 3, 3, 3, 2, 2, 3, 3, 3, 3, 4, 4, 2, 1, 2, 2, 2, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 COMMENTS For n > 0: a(A000290(n)) = 1; for n > 1: a(A002522(n)) = 2; a(n) <= A000196(n). LINKS Reinhard Zumkeller, Table of n, a(n) for n = 0..10000 PROG (Haskell) a190321 n = g n \$ reverse \$ takeWhile (<= n) \$ tail a000290_list where   g _ []                 = 0   g m (x:xs) | x > m     = g m xs              | otherwise = signum m' + g r xs where (m', r) = divMod m x CROSSREFS Cf. A190311, A053610. Sequence in context: A091237 A143477 A214774 * A238890 A266968 A237593 Adjacent sequences:  A190318 A190319 A190320 * A190322 A190323 A190324 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, May 08 2011 STATUS approved

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