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 A073779 Number of 0's in base-3 representation of n-th prime. 5
 0, 1, 0, 0, 1, 0, 0, 1, 0, 2, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 3, 2, 1, 2, 1, 1, 2, 1, 1, 0, 2, 1, 0, 0, 0, 3, 2, 2, 1, 2, 2, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 3, 2, 3, 2, 3, 2, 2, 1, 1, 2, 1, 1, 2, 2, 1, 1, 1, 2, 1, 0, 0, 2, 1, 1, 1, 0, 2, 1, 1, 1, 2, 1, 1, 0, 0, 2, 1, 1, 1, 4, 3, 2, 2, 2, 2, 2, 3, 2, 1, 1, 3, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,10 COMMENTS a(n) = 0 if prime(n) is in A082555. - Robert Israel, Dec 28 2018 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A077267(A000040(n)). - Michel Marcus, Oct 02 2013 EXAMPLE a(10)=2 as 10th prime is 29 in base-10 representation, or 1002 in base-3 representation. MAPLE f:= n -> numboccur(0, convert(ithprime(n), base, 3)): map(f, [\$1..200]); # Robert Israel, Dec 28 2018 MATHEMATICA A073779[n_] := Length[Cases[IntegerDigits[Prime[n], 3], 0]]; DigitCount[#, 3, 0]&/@Prime[Range[120]] (* Harvey P. Dale, Apr 26 2011 *) PROG (Magma) [ Multiplicity({* a: a in Intseq(p, 3) *}, 0): p in PrimesUpTo(600) ]; // Klaus Brockhaus, Oct 10 2010 CROSSREFS Cf. A073780, A073781, A077267, A082555. Sequence in context: A319368 A092410 A100204 * A081227 A301469 A004610 Adjacent sequences: A073776 A073777 A073778 * A073780 A073781 A073782 KEYWORD base,easy,nonn AUTHOR Zak Seidov, Aug 11 2002 EXTENSIONS More terms from Klaus Brockhaus, Oct 10 2010 STATUS approved

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)