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 A097886 #17 Dec 26 2022 05:01:14
%S A097886 1,1,1,1,2,1,1,1,2,3,1,1,2,3,5,1,2,3,5,7,2,3,5,7,10,1,1,1,2,3,1,1,2,3,
%T A097886 5,1,2,3,5,7,2,3,5,7,10,3,5,7,10,14,1,1,2,3,5,1,2,3,5,7,2,3,5,7,10,3,
%U A097886 5,7,10,14,5,7,10,14,20,1,2,3,5,7,2,3,5,7,10,3,5,7,10,14,5,7,10,14,20,7,10
%N A097886 Flattened 5 x 5 matrices: the n-th power a matrix M multiplied by some matrix A.
%C A097886 This sequence is an interlacing of 25 copies of the absolute values of A107332.
%t A097886 M={{0, 1, 0, 0, 0}, {0, 0, 1, 0, 0}, {0, 0, 0, 1, 0}, {0, 0, 0, 0, 1}, {1, 0, -1, 1, 1}}
%t A097886 A[n_]:=M.A[n-1];
%t A097886 A[0]:={{1, 1, 1, 1, 1}, {1, 1, 1, 1, 2}, {1, 1, 1, 2, 3}, {1, 1, 2, 3, 5}, {1, 2, 3, 5, 7}};
%t A097886 b=Flatten[Table[M.A[n], {n, 0, 12}]]
%K A097886 nonn,easy,less,obsc
%O A097886 1,5
%A A097886 _Roger L. Bagula_, Sep 02 2004
%E A097886 Edited by the Associate Editors of the OEIS, Nov 17 2009