login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A297000 Numbers n such that A296992(n) = 1. 1
5, 7, 10, 14, 15, 20, 25, 28, 30, 35, 45, 49, 50, 56, 60, 63, 70, 75, 80, 88, 90, 91, 92, 98, 100, 105, 112, 115, 125, 126, 140, 147, 150, 160, 161, 175, 180, 182, 196, 200, 207, 210, 224, 225, 230, 240, 245, 250, 252, 264, 273, 276, 294, 300, 315, 320, 322, 343 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..58.

Eric Weisstein's World of Mathematics, Tau Function.

MATHEMATICA

1 + Position[Table[-1 + SelectFirst[Range[0, 5], ! Divisible[RamanujanTau@ n, n^#] &], {n, 2, 350}], 1][[All, 1]] (* Michael De Vlieger, Dec 23 2017 *)

CROSSREFS

Cf. A000594, A063938, A296992.

Sequence in context: A025074 A065503 A152001 * A282107 A022441 A156243

Adjacent sequences:  A296997 A296998 A296999 * A297001 A297002 A297003

KEYWORD

nonn

AUTHOR

Seiichi Manyama and Robert G. Wilson v, Dec 23 2017

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 16 01:55 EDT 2021. Contains 343937 sequences. (Running on oeis4.)