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 A375745 #24 Sep 01 2024 09:38:19 %S A375745 1,1,4,4,16,4,36,16,36,16,100,16,144,36,72,64,256,36,324,64,156,100, %T A375745 484,64,400,144,324,144,784,72,900,256,420,256,648,144,1296,324,600, %U A375745 256,1600,156,1764,400,648,484,2116,256,1764,400,1056,576,2704,324,1720,576 %N A375745 a(n) is the sum of the vector of the reduced discriminant of the n-th cyclotomic polynomial. %C A375745 Conjecture: a(n) >= phi(n)^2 = A127473(n), and for n>=2 strictly greater iff n is in A070537. %o A375745 (PARI) a(n) = vecsum(poldiscreduced(polcyclo(n))); %Y A375745 Cf. A127473, A070537, A004124. %K A375745 nonn %O A375745 1,3 %A A375745 _Darío Clavijo_, Aug 26 2024