a(n) = the least number k such that cos(2pi/k) is an algebraic number of a prime(n)-smooth degree, but not prime(n-1)-smooth.
3, 7, 11, 29, 23, 53, 103, 191, 47, 59, 311, 149, 83, 173, 283, 107, 709, 367, 269, 569
3 seqfan posts
Thu Oct 20 22:13:34 CEST 2011 [seqfan] Re: Smallest prime of form k*p(n) + 1
Thu Oct 20 18:54:35 CEST 2011 [seqfan] Re: Smallest prime of form k*p(n) + 1
Thu Oct 20 18:02:04 CEST 2011 [seqfan] Smallest prime of form k*p(n) + 1
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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