cp's OEIS Frontend

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.

A119863 Numbers k such that k^3 + k^2 + 1 is prime.

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%I A119863 #20 Sep 08 2018 12:44:03
%S A119863 1,2,3,5,8,9,11,12,23,24,26,30,35,42,44,45,47,53,56,57,62,66,68,69,71,
%T A119863 74,86,87,89,92,101,111,120,122,123,125,140,143,147,152,170,177,179,
%U A119863 180,191,192,195,198,203,209,219,224,230,234,239,243,245,246,254,255,263
%N A119863 Numbers k such that k^3 + k^2 + 1 is prime.
%H A119863 Harvey P. Dale, <a href="/A119863/b119863.txt">Table of n, a(n) for n = 1..1000</a>
%e A119863 92^3 + 92^2 + 1 = 787153 (prime), so 92 is in the sequence.
%p A119863 a:=proc(n) if isprime(n^3+n^2+1)=true then n else fi end: seq(a(n),n=0..300); # _Emeric Deutsch_, Aug 04 2006
%t A119863 Select[Range[300],PrimeQ[#^3+#^2+1]&] (* _Harvey P. Dale_, May 03 2014 *)
%o A119863 (PARI) is(n)=isprime(n^3+n^2+1) \\ _Charles R Greathouse IV_, Jan 21 2015
%Y A119863 Cf. A005574.
%K A119863 nonn
%O A119863 1,2
%A A119863 _Parthasarathy Nambi_, Jul 31 2006
%E A119863 More terms from _Emeric Deutsch_ and _R. J. Mathar_, Aug 04 2006