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A179923 Primes of the form (n^2)*(n+1)^2 + 1. 1

%I #8 Mar 05 2015 07:42:03

%S 5,37,401,3137,8101,12101,24337,44101,57601,93637,176401,864901,

%T 1976837,2689601,3920401,6502501,10929637,13395601,27625537,30802501,

%U 32490001,36072037,41990401,46321637,58614337,83174401,98010001,110376037

%N Primes of the form (n^2)*(n+1)^2 + 1.

%C a(n) is also one added to the square of a pronic number.

%H Charles R Greathouse IV, <a href="/A179923/b179923.txt">Table of n, a(n) for n = 1..10000</a>

%o (PARI) for(n=1, 1e4, if(ispseudoprime(t=n^4+2*n^3+n^2+1), print1(t", "))); v \\ _Charles R Greathouse IV_, Feb 18 2011

%K easy,nonn

%O 1,1

%A Kevin Batista (kevin762401(AT)yahoo.com), Aug 01 2010

%E 57601 inserted by _R. J. Mathar_, Aug 03 2010

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Last modified April 24 08:28 EDT 2024. Contains 371927 sequences. (Running on oeis4.)