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 A192215 #22 May 10 2024 08:50:11 %S A192215 0,0,48,320,5925,33936,691880,5107200,69610716,628484000 %N A192215 Number of zero trace primitive elements in Galois field GF(11^n). %F A192215 a(n) = n * A192510(n). - _Joerg Arndt_, Jul 03 2011 %o A192215 (Sage) %o A192215 def a(n): %o A192215 ans = 0 %o A192215 for x in GF(11^n): %o A192215 if x!=0 and x.trace()==0 and x.multiplicative_order()==11^n-1: ans += 1 %o A192215 return ans # _Robin Visser_, May 10 2024 %Y A192215 Cf. A192211, A192212, A192213, A192214, A192216 for other primes. %K A192215 nonn,hard,more %O A192215 1,3 %A A192215 _Pasha Zusmanovich_, Jun 25 2011 %E A192215 a(6)-a(7) from A192510 by _Jean-François Alcover_, Mar 02 2020 %E A192215 a(8)-a(10) from _Robin Visser_, May 10 2024