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!)
A204768 7^p - 6^p - 1,  with p = prime(n). 4

%I

%S 12,126,9030,543606,1614529686,83828316390,215703854542470,

%T 10789535445362646,26579017117027313526,3183060102526390833854310,

%U 156448938516521406467644086,18500229372226631089176131976870

%N 7^p - 6^p - 1, with p = prime(n).

%C For n>2 all terms are divisible by 1806 = 2*3*7*43.

%H Vincenzo Librandi, <a href="/A204768/b204768.txt">Table of n, a(n) for n = 1..100</a>

%t Table[(7^Prime[n] - 6^Prime[n] - 1), {n, 1, 20}] (* _Vincenzo Librandi_, May 04 2014 *)

%o (MAGMA) [(7^p-6^p-1): p in PrimesUpTo(100)];

%Y Cf. A016169.

%K nonn

%O 1,1

%A _Vincenzo Librandi_, Mar 07 2012

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 October 17 17:21 EDT 2021. Contains 348065 sequences. (Running on oeis4.)