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 A117229 Number of decimal digits of n in {0,1,4,8,9} 0
 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 2, 2, 1, 1, 2, 1, 1, 1, 2, 2, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 2, 2, 1, 1, 2, 1, 1, 1, 2, 2, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 2, 2, 1, 1, 2, 1, 1, 1, 2, 2, 2, 2, 1, 1, 2, 1, 1, 1, 2, 2, 3, 3, 2, 2, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,11 COMMENTS Previous name was "Number of perfect powers A001597 seen in the base 10 representation of n". - Felix Fröhlich, Aug 29 2014 LINKS Table of n, a(n) for n=0..104. MAPLE f:= n -> nops(select(member, convert(n, base, 10), {0, 1, 4, 8, 9})): map(f, [\$0..1000]); # Robert Israel, Aug 12 2014 PROG (PARI) a(n, v= [1, 1, 0, 0, 1, 0, 0, 0, 1, 1]) = {if (!n, return (1)); d = digits(n); sum(i=1, #d, v[d[i]+1]); } \\ Michel Marcus, Aug 10 2014 CROSSREFS Sequence in context: A255481 A241418 A330348 * A264119 A225518 A269972 Adjacent sequences: A117226 A117227 A117228 * A117230 A117231 A117232 KEYWORD base,easy,nonn AUTHOR Giovanni Teofilatto, Apr 22 2006 EXTENSIONS New definition by Robert Israel and Felix Fröhlich, Aug 08 2014 STATUS approved

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Last modified June 4 23:50 EDT 2023. Contains 363130 sequences. (Running on oeis4.)