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 A074743 #16 Aug 13 2017 14:12:16
%S A074743 1,1,2,1,3,3,38,1,32,105,216,715,67,271,84,881,1530,8575,25230,7000,
%T A074743 215747,170340,361604,3037958,8412642,880890,2162059,5110722,55981,
%U A074743 3569337
%N A074743 Smallest k such that trinomial x^A001153(n) + x^k + 1 over GF(2) is primitive.
%H A074743 R. P. Brent, <a href="http://maths.anu.edu.au/~brent/trinomlg.html">Trinomial Log Files and Certificates</a>
%H A074743 A. J. Menezes, P. C. van Oorschot and S. A. Vanstone, <a href="http://www.cacr.math.uwaterloo.ca/hac/">Handbook of Applied Cryptography</a>, CRC Press, 1996; see p. 162.
%H A074743 <a href="/index/Tri#trinomial">Index entries for sequences related to trinomials over GF(2)</a>
%p A074743 for n from 1 to 16 do for k from 1 to A001153(n)-1 do if(Primitive(x^A001153(n) + x^k + 1) mod 2)then printf("%d, ",k): break: fi:od:od: # _Nathaniel Johnston_, Apr 21 2011
%K A074743 nonn,more
%O A074743 1,3
%A A074743 _N. J. A. Sloane_, Sep 06 2002
%E A074743 a(8)-a(16) from _Nathaniel Johnston_, Apr 21 2011
%E A074743 a(17)-a(30) from Brent's data added by _Max Alekseyev_, Oct 22 2011