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 A181348 #7 Aug 15 2019 06:03:35 %S A181348 1,1,1,1,1,1,2,1,1,1,3,1,1,1,1,3,3,2,1,1,1,15,3,1,1,1,1,1,30,15,1,3,2, %T A181348 1,1,1,70,15,5,3,3,1,1,1,1,105,35,10,15,3,1,2,1,1,1,7,105,70,15,3,1,3, %U A181348 1,1,1,1,105,7,35,35,6,5,3,3,2,1,1,1,385,105,7,105,14,5,15,3,1,1,1,1,1,3465 %N A181348 Denominators of lower triangular matrix T:=log(F), with the matrix F:=A037027 (Fibonacci convolution matrix). %C A181348 The triangle of the numerators is given by A181347. %C A181348 See the comments given in A181347. %H A181348 Wolfdieter Lang, <a href="/A181347/a181347.pdf">A181347/A181348, Logarithm of the Fibonacci matrix A037027</a> %F A181348 a(n,m) = denominator((log F)(n,m)), with the Fibonacci lower triangular matrix F=A037027. %e A181348 The triangle starts with the rows[1]; [1,1]; [1,1,1]; [2,1,1,1]; [3,1,1,1,1]; ... %e A181348 The rational triangle T (with main diagonal elements 0) starts with the rows [0]; [1, 0]; [1, 2, 0]; [-1/2, 2, 3, 0]; [-1/3, -1, 3, 4, 0];... %Y A181348 Cf. A037027, A181347. %K A181348 nonn,easy,tabl %O A181348 0,7 %A A181348 _Wolfdieter Lang_, Oct 15 2010