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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A176913 Numbers k with maximal exponent in prime factorization equal to 1, such that k+1 has maximal exponent 2, k+2 has maximal exponent 3, and k+3 has maximal exponent 4. 1
 2022, 11149, 11373, 17574, 22381, 25037, 26701, 27949, 31210, 36123, 49974, 61395, 65581, 67373, 70541, 75373, 75949, 88747, 97549, 103373, 108294, 110886, 112045, 114774, 118285, 147174, 159757, 162349, 172717, 174390, 175373, 195531, 202957 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE a(1) = 2022 from 2022 = 2*3*337, 2023 = 7*17^2, 2024 = 2^3*11*23, and 2025 = 3^4*5^2. MATHEMATICA f[n_]:=Max[Last/@FactorInteger[n]]; lst={}; Do[If[f[n]==1&&f[n+1]==2&&f[n+2]==3&&f[n+3]==4, AppendTo[lst, n]], {n, 2, 9!}]; lst SequencePosition[Table[Max[FactorInteger[n][[;; , 2]]], {n, 250000}], {1, 2, 3, 4}][[;; , 1]] (* Harvey P. Dale, Aug 21 2024 *) CROSSREFS Cf. A051903. Sequence in context: A252327 A252326 A119423 * A013687 A257766 A359839 Adjacent sequences: A176910 A176911 A176912 * A176914 A176915 A176916 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, Apr 28 2010 EXTENSIONS Edited by N. J. A. Sloane, Dec 29 2021 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 16 23:59 EDT 2024. Contains 375984 sequences. (Running on oeis4.)