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 A373277 #8 May 29 2024 13:47:05
%S A373277 1,3,16,84,480,2792,16807,102900,640528,4035120,25679568,164775800,
%T A373277 1064714400,6920635197,45214871360,296722542900,1954878268800,
%U A373277 12923917122536,85705978837392,569944757250960,3799631728452112,25388448354582216,169992219503608176
%N A373277 Number of monic irreducible polynomials over GF(7) with fixed nonzero trace.
%H A373277 Frank Ruskey, <a href="http://combos.org/Tpoly">Number of monic irreducible polynomials over GF(q) with given trace</a>
%F A373277 a(n) = 1/(7*n) * Sum_{d|n, gcd(d,7)=1} mu(d) * 7^(n/d).
%o A373277 (PARI) a(n) = sumdiv(n, d, (gcd(d, 7)==1)*(moebius(d)*7^(n/d)))/(7*n);
%Y A373277 Column 7 of A110540.
%K A373277 nonn
%O A373277 1,2
%A A373277 _Seiichi Manyama_, May 29 2024