login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A117579 Numerator of Sum[i=1..n] 1/(p(i)^p(i)), p(i) = i-th prime. 7

%I #5 Jan 24 2013 09:57:26

%S 1,31,96983,79870008269,22787845491220720044859,

%T 6901871132161346809864777612017764827,

%U 5709505682874900155174610004469973097336266239002423739879,11295798267103963562742898223286548990219261148710007871289771185589362412305596041

%N Numerator of Sum[i=1..n] 1/(p(i)^p(i)), p(i) = i-th prime.

%F a(n) = Numerator of Sum[i=1..n] 1/(p(i)^p(i)). a(n) = Numerator of Sum[i=1..n] 1/(A000040(i)^A000040(i)). a(n) = Numerator of Sum[i=1..n] 1/A051674(i).

%e 1/4, 31/108, 96983/337500, 79870008269/277945762500, 22787845491220720044859/79301169838123235887500,

%e 6901871132161346809864777612017764827/24018350267611933650627567399079537500

%t Numerator[Accumulate[1/#^#&/@Prime[Range[10]]]] (* _Harvey P. Dale_, Jan 24 2013 *)

%Y Denominators = A076265.

%Y Cf. A000040, A051674.

%K easy,frac,nonn

%O 1,2

%A _Jonathan Vos Post_, Mar 29 2006

%E Corrected and extended by _Harvey P. Dale_, Jan 24 2013

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 06:14 EDT 2024. Contains 371964 sequences. (Running on oeis4.)