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A156557 Primes of the form Sum_{k=1..m} (m^k mod (m+k)). 3

%I #8 Aug 02 2021 12:12:40

%S 2,23,43,67,73,541,673,911,2333,3733,4451,4657,5279,6043,7591,8887,

%T 9521,12539,16651,20173,26111,26981,30029,30817,33601,34981,37357,

%U 41983,42359,45007,47947,53819,58907,69239,75617,79309,81421,97931,101879,104459,110597

%N Primes of the form Sum_{k=1..m} (m^k mod (m+k)).

%p P:=proc(i) local a,n; for n from 0 by 1 to i do a:=sum('(n^k mod (n+k))','k'=1..n); if isprime(a) then print(a); fi; od; end: P(500);

%Y Cf. A156556, A156558, A156559.

%K nonn,easy

%O 1,1

%A _Paolo P. Lava_ and _Giorgio Balzarotti_, Feb 10 2009

%E Offset changed to 1 by _Jinyuan Wang_, Aug 02 2021

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Last modified August 30 07:09 EDT 2024. Contains 375532 sequences. (Running on oeis4.)