login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A177907 Numbers n such that n^3 divides 7^(n^2)-1. 15
1, 2, 3, 4, 6, 8, 10, 12, 20, 24, 30, 40, 50, 57, 60, 68, 78, 100, 110, 111, 114, 120, 136, 150, 156, 200, 204, 220, 222, 228, 258, 300, 312, 330, 340, 390, 408, 440, 444, 456, 516, 550, 570, 600, 660, 680, 780, 820, 876, 888, 930, 1010, 1020, 1032, 1086, 1100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..56.

MATHEMATICA

Select[Range[1100], Divisible[7^(#^2)-1, #^3]&] (* Harvey P. Dale, Nov 05 2011 *)

CROSSREFS

Cf. A067947 = Numbers n such that n divides 7^n-1.

Cf. A127107 = Numbers n such that n^2 divides 7^n-1.

Cf. A129211, A129212, A177905, A127106, A177907, A127102, A177909, A177243.

Cf. A177911, A177912, A177913, A177914, A177915, A177916, A177917, A177918, A177919, A177920.

Sequence in context: A029469 A061953 A029517 * A083006 A096061 A100919

Adjacent sequences:  A177904 A177905 A177906 * A177908 A177909 A177910

KEYWORD

nonn

AUTHOR

Alexander Adamchuk, May 14 2010

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 March 19 13:08 EDT 2019. Contains 321330 sequences. (Running on oeis4.)