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 A140671 #2 Mar 30 2012 17:22:50 %S A140671 150,820,2751,9298,18016,38907,62286,110681 %N A140671 Numbers useful in computing A(k), the largest possible magnitude of the x^k coefficient in a cyclotomic polynomial. %C A140671 The values of A(k) are in sequence A138474. The least order N(k) of the cyclotomic polynomial producing A(k) is A138475(k). For k >= a(n), computational experiments have shown that only primes >= prime(n) divide N(k). These terms were determined empirically; is there another way of characterizing these numbers? %K A140671 nonn %O A140671 3,1 %A A140671 _T. D. Noe_, May 21 2008