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!)
A165744 Numbers n with property that 6^n is the sum of two consecutive primes. 0
2, 3, 7, 36, 54, 143, 1102, 1678 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

n=2: 6^2 = 36     = 17 + 19         = prime(7) + prime(8);

n=3: 6^3 = 216    = 107 + 109       = prime(28) + prime(29);

n=7: 6^7 = 279936 = 139967 + 139969 = prime(13005) + prime(13006).

MATHEMATICA

(*M6*)Do[If[PreviousPrime[6^n/2]+NextPrime[6^n/2]==6^n, Print[n]], {n, 1000}]

CROSSREFS

Cf. A071087, A074924.

Sequence in context: A004026 A135907 A027624 * A330554 A304524 A034900

Adjacent sequences:  A165741 A165742 A165743 * A165745 A165746 A165747

KEYWORD

nonn,more

AUTHOR

Zak Seidov, Sep 26 2009

EXTENSIONS

a(7) from Max Alekseyev, Dec 14 2011

a(8) from Amiram Eldar, Apr 06 2019

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 28 14:58 EDT 2020. Contains 333089 sequences. (Running on oeis4.)