A079163 Number of 9's in n# (n primorial) = 9's in A002110(n).

0, 0, 0, 0, 0, 0, 0, 4, 1, 2, 1, 0, 0, 0, 2, 2, 2, 3, 2, 5, 4, 3, 4, 1, 2, 2, 4, 7, 7, 4, 6, 6, 3, 7, 4, 8, 7, 5, 11, 11, 8, 7, 14, 8, 8, 13, 10, 8, 5, 16, 6, 8, 10, 5, 14, 14, 14, 12, 15, 15, 15, 11, 7, 12, 14, 13, 18, 15, 17, 10, 17, 13, 18, 14, 13, 16, 20, 16, 14, 17, 19, 19, 18, 22, 13, 19

Offset

2,8

Links

Vincenzo Librandi, Table of n, a(n) for n = 2..1000

Mathematica

DigitCount[#, 10, 9]&/@Rest[FoldList[Times, 1, Prime[Range[90]]]] (* Harvey P. Dale, Dec 07 2011 *)

Prog

(PARI) See program in Number of 0's in n#

Crossrefs

Cf. A002110.

Sequence in context: A274438 A365387 A087565 * A108536 A232631 A153094

Adjacent sequences: A079160 A079161 A079162 * A079164 A079165 A079166

Keyword

easy,nonn

Author

Cino Hilliard, Feb 03 2003

Status

approved