This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A161469 #20 Jul 29 2025 08:37:04
%S A161469 2,5,17,613,129266611,7625731683761,150094704016430497,
%T A161469 2503155504994422192936289397051173,
%U A161469 4638397686588101984398752568803509060305779468709
%N A161469 Primes of the form 3^k + 2^k - k^3 + k^2.
%C A161469 The associated values of k are 0, 1,3,6,17,27,36,70,102,237,377,463,576,639,683,... - _R. J. Mathar_, Jun 12 2009 [Amended by _Harvey P. Dale_, Jan 23 2023]
%C A161469 The next term (a(10)) has 114 digits. - _Harvey P. Dale_, Jan 23 2023
%t A161469 lst={};Do[If[PrimeQ[p=(3^n+2^n)-(n^3-n^2)],AppendTo[lst,p]],{n,0,6!}];lst
%t A161469 Select[Table[3^k+2^k-k^3+k^2,{k,0,200}],PrimeQ] (* _Harvey P. Dale_, Jan 23 2023 *)
%o A161469 (Magma) [ a: n in [1..450] | IsPrime(a) where a is 3^n+2^n-n^3+n^2]; // _Vincenzo Librandi_, Nov 30 2010
%Y A161469 Cf. A058765, A082101, A161470.
%K A161469 nonn
%O A161469 1,1
%A A161469 _Vladimir Joseph Stephan Orlovsky_, Jun 10 2009
%E A161469 Definition simplified by _R. J. Mathar_, Jun 12 2009
%E A161469 a(1) = 2 prepended by _Harvey P. Dale_, Jan 23 2023