The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A094873 n! has a triangular number of digits. 0
 0, 1, 2, 3, 5, 6, 9, 13, 17, 32, 38, 44, 65, 106, 125, 135, 156, 178, 201, 213, 278, 292, 306, 335, 350, 381, 413, 446, 463, 480, 570, 589, 608, 647, 667, 687, 728, 749, 770, 880, 996, 1020, 1044, 1169, 1247, 1300, 1327, 1354, 1437, 1551, 1669, 1699, 1760 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Table of n, a(n) for n=0..52. FORMULA {n: A034886(n) in A000217}. - R. J. Mathar, Nov 15 2019 MATHEMATICA Select[Range[0, 1800], OddQ[Sqrt[1+8 IntegerLength[#!]]]&] (* Harvey P. Dale, Aug 07 2023 *) CROSSREFS Cf. A000217, A006488. Sequence in context: A330228 A166048 A240306 * A240726 A240203 A018126 Adjacent sequences: A094870 A094871 A094872 * A094874 A094875 A094876 KEYWORD base,nonn AUTHOR Jason Earls, Jun 16 2004 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 21 21:57 EDT 2023. Contains 365503 sequences. (Running on oeis4.)