A079100 Number of 1's in n# (n primorial) = 1's in A002110(n).

0, 0, 0, 1, 1, 0, 2, 0, 0, 0, 1, 2, 1, 3, 3, 2, 3, 3, 2, 2, 2, 2, 3, 3, 4, 1, 3, 5, 4, 5, 5, 6, 6, 5, 5, 8, 4, 7, 9, 5, 11, 5, 5, 11, 11, 9, 12, 11, 12, 11, 9, 14, 17, 10, 11, 6, 15, 10, 20, 8, 9, 9, 6, 10, 15, 14, 17, 13, 10, 12, 11, 15, 15, 17, 12, 18, 15, 19, 13, 29, 16, 8, 14, 20, 16, 16, 32

Offset

2,7

Links

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

Mathematica

DigitCount[#, 10, 1]&/@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: A303138 A276205 A244966 * A296167 A244233 A227345

Adjacent sequences: A079097 A079098 A079099 * A079101 A079102 A079103

Keyword

nonn,base,easy

Author

Cino Hilliard, Feb 03 2003

Status

approved