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 A166492 #7 May 07 2019 23:50:04 %S A166492 3,8,5,15,6,7,24,21,16,9,35,16,9,5,11,48,45,40,33,24,13,63,30,55,12, %T A166492 39,14,15,80,77,24,65,56,15,32,17,99,48,91,21,15,32,51,9,19,120,117, %U A166492 112,105,96,85,72,57,40,21,143,70,45,32,119,18,95,10,7,22,23,168,165,160,153,144 %N A166492 Table of numerators of A120070(n,m)/A002260(n,m), 1 <= m < n. %C A166492 Numerators of the fractions (n+m)*(n-m)/m. %C A166492 The numerical values are between A120070(n,m) and A120072(n,m), see A164561. %C A166492 If we "flatten" the table (enumerate the sequence starting at 1 instead of using the double index), the positions where a common factor is removed from the numerator A120070 and denominator A002260 are at 5, 12, 13, etc., as given by A076537. %p A166492 A120070 := proc(n,m) (n+m)*(n-m) ; end: %p A166492 A002260 := proc(n,m) m ; end: %p A166492 A166492 := proc(n,m) A120070(n,m)/A002260(n+1,m) ; numer(%) ; end: seq(seq(A166492(n,m),m=1..n-1),n=2..17) ; # _R. J. Mathar_, Oct 21 2009 %Y A166492 Cf. A129326. %K A166492 nonn,frac,tabl %O A166492 2,1 %A A166492 _Paul Curtz_, Oct 15 2009 %E A166492 Edited and extended by _R. J. Mathar_, Oct 21 2009