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!)
A290014 Values of n for which Sum_{k=1..n} k!^10 is prime. 3

%I #11 Jul 17 2017 16:25:21

%S 3,4,5,16,25

%N Values of n for which Sum_{k=1..n} k!^10 is prime.

%C Sum_{k=1..n} k!^10 is divisible by 41 for n >= 40, and checking the terms below that gives Sum_{k=1..a(5)} k!^10 with a(5) = 25 as the final prime in the sequence.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/FactorialSums.html">Factorial Sums</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/IntegerSequencePrimes.html">Integer Sequence Primes</a>

%e Sum_{k=1..3} k!^10 = 60467201 is prime.

%e Sum_{k=1..4} k!^10 = 63403441432577 is prime.

%e Sum_{k=1..5} k!^10 = 619173705643441432577 is prime.

%e ...

%Y Cf. A100289 (k!^2), A289947 (k!^6).

%K nonn,bref,full,fini

%O 1,1

%A _Eric W. Weisstein_, Jul 17 2017

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 23 12:08 EDT 2024. Contains 371912 sequences. (Running on oeis4.)