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 A077268 Number of bases in which n requires at least one zero to be written. 1
 0, 1, 1, 2, 2, 3, 1, 3, 3, 4, 3, 5, 2, 3, 3, 4, 3, 6, 4, 6, 4, 3, 2, 7, 3, 4, 5, 7, 4, 7, 2, 6, 5, 5, 6, 8, 4, 5, 5, 8, 3, 7, 2, 5, 6, 4, 3, 9, 4, 7, 7, 7, 4, 9, 6, 8, 4, 4, 3, 11, 3, 4, 5, 7, 7, 9, 4, 6, 6, 9, 4, 11, 5, 6, 8, 7, 7, 9, 4, 9, 6, 6, 5, 12, 6, 5, 5, 9, 4, 11, 5, 6, 4, 4, 5, 11, 4, 7, 8, 10, 6 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS EXAMPLE a(9)=3 since it requires zeros when written in bases 2, 3 or 9 (as 1001, 100 or 10 respectively). CROSSREFS Cf. A033093, A062842, A077266, A077267. Sequence in context: A071681 A135621 A224764 * A162911 A131821 A204123 Adjacent sequences:  A077265 A077266 A077267 * A077269 A077270 A077271 KEYWORD base,nonn AUTHOR Henry Bottomley, Nov 01 2002 STATUS approved

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