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
12, 126, 9030, 543606, 1614529686, 83828316390, 215703854542470, 10789535445362646, 26579017117027313526, 3183060102526390833854310, 156448938516521406467644086, 18500229372226631089176131976870 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..100

MATHEMATICA

Table[(7^Prime[n] - 6^Prime[n] - 1), {n, 1, 20}] (* Vincenzo Librandi, May 04 2014 *)

PROG

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

CROSSREFS

Cf. A016169.

Sequence in context: A062199 A199528 A124797 * A045508 A215774 A275941

Adjacent sequences:  A204765 A204766 A204767 * A204769 A204770 A204771

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Mar 07 2012

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 September 17 03:42 EDT 2021. Contains 347478 sequences. (Running on oeis4.)