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 A158381 #6 Aug 04 2025 11:13:25 %S A158381 1,2,3,4,6,7,10,12,15,17,22,24,30,34,38,43,50,55,63,67,73,81,89,96, %T A158381 105,113,121,131,142,151,163,171,182,190,204,215,228,239,254,266,282, %U A158381 294,308,323,337,354,371,383,401,417,435,451,469,482,502,519,542,562,583 %N A158381 Positions of Fibonacci numbers in the sequence of Markoff numbers (A002559). %C A158381 Only the odd-indexed Fibonacci numbers appear in the Markoff sequence. The n-th term is about 0.1673*n^2. %Y A158381 Cf. A002559, A158384. %K A158381 nonn %O A158381 1,2 %A A158381 _T. D. Noe_, Mar 19 2009