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 A280691 #9 Jan 12 2017 07:18:36 %S A280691 1,1,1,2,1,7,1,10,7,61,1,26,1,547,61,82,1,703,1,242,547,44287,1,730, %T A280691 61,398581,703,2186,1,58807,1,6562,44287,32285041,547,19682,1, %U A280691 290565367,398581,59050,1,4780783,1,177146,58807,23535794707,1,531442,547,3472494301,32285041,1594322,1,387400807,44287,4782970,290565367,17157594341221,1,14348906,1 %N A280691 a(n) = A015518(A032742(n)) / A015518(A054576(n)). %C A280691 A015518 is a divisibility sequence, which guarantees that the result of the division is an integer. %C A280691 a(n) is a function of A032742(n). %H A280691 Antti Karttunen, <a href="/A280691/b280691.txt">Table of n, a(n) for n = 1..547</a> %H A280691 Wikipedia, <a href="https://en.wikipedia.org/wiki/Divisibility_sequence">Divisibility sequence</a> %F A280691 a(n) = A015518(A032742(n)) / A015518(A054576(n)). %o A280691 (Scheme) (define (A280691 n) (/ (A015518 (A032742 n)) (A015518 (A054576 n)))) %Y A280691 Cf. A015518, A032742, A054576. %Y A280691 Cf. also A280689. %K A280691 nonn %O A280691 1,4 %A A280691 _Antti Karttunen_, Jan 11 2017