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 A207335 #11 Oct 02 2013 19:16:05 %S A207335 3,3,2,4,1,4,5,2,3,1,7,1,1,6,5,6,2,2,1,9,1,1,2,1,5,7,1,1,11,1,8,1,4,4, %T A207335 2,13,2,1,2,1,5,1,4,2,11,1,8,1,4,1,1,2,16,1,1,4,10 %N A207335 Number of minimal polynomials of 2*cos(Pi/N) with allowed degree given by A207333. %C A207335 For the minimal polynomials C(N,x) of 2*cos(Pi/N) with degree delta(N) see A207333. %F A207335 a(n) is the number of different indices N of minimal polynomials C(N,x) of 2*cos(Pi/N) with allowed degree delta(N)=A207333(n), n>=1. %e A207335 a(8)=2 because there are exactly 2 values of N, namely 19 and 27 (see row no. 7 of the array A207334), for which the minimal polynomial C(N,x) has degree delta(N) = A207333(8) = 9. %Y A207335 Cf. A207333, A143422. %K A207335 nonn,easy %O A207335 1,1 %A A207335 _Wolfdieter Lang_, Feb 19 2012