A048856 Number of digits of prime(n)# + 1.

1, 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 15, 17, 18, 20, 22, 24, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 56, 58, 60, 62, 64, 66, 69, 71, 73, 76, 78, 80, 82, 85, 87, 89, 92, 94, 97, 99, 101, 104, 106, 109, 111, 113, 116, 118, 121, 123, 126, 128

Offset

1,3

Links

Table of n, a(n) for n=1..65.

H. Ibstedt, A Few Smarandache Integer Sequences, Smarandache Notions Journal, Vol. 8, No. 1-2-3, 1997, pp. 171-183.

Mathematica

prod = 1; Table[prod = prod*Prime[n]; Length[IntegerDigits[prod + 1]], {n, 100}] (* T. D. Noe, May 05 2013 *)
IntegerLength/@(FoldList[Times, Prime[Range[70]]]+1) (* Harvey P. Dale, Nov 17 2020 *)

Crossrefs

Essentially the same as A067175.

Cf. A002110.

Sequence in context: A033104 A191325 A190209 * A067175 A225804 A049809

Adjacent sequences: A048853 A048854 A048855 * A048857 A048858 A048859

Keyword

nonn,base,less

Author

Charles T. Le (charlestle(AT)yahoo.com)

Extensions

Corrected and extended by Arkadiusz Wesolowski, May 04 2013

Status

approved