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A079135 Number of 7's in n# (n primorial) = 7's in A002110(n). 1
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 2, 1, 2, 1, 3, 2, 3, 3, 2, 2, 5, 4, 5, 5, 3, 2, 6, 9, 4, 3, 10, 7, 2, 4, 2, 13, 2, 5, 4, 6, 9, 6, 6, 9, 7, 10, 9, 11, 10, 8, 5, 5, 7, 6, 10, 16, 10, 14, 12, 14, 10, 16, 13, 10, 12, 14, 13, 16, 17, 13, 20, 14, 11, 12, 8, 10, 15, 17, 9, 16, 15, 26, 21, 18, 19, 20, 28 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,12

LINKS

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

MATHEMATICA

DigitCount[#, 10, 7]&/@Rest[FoldList[Times, 1, Prime[Range[100]]]] (* Vincenzo Librandi, Apr 07 2014 *)

PROG

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

CROSSREFS

Cf. A002110.

Sequence in context: A046800 A027350 A029327 * A271315 A212813 A112219

Adjacent sequences:  A079132 A079133 A079134 * A079136 A079137 A079138

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, Feb 03 2003

STATUS

approved

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Last modified December 11 05:41 EST 2017. Contains 295868 sequences.