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 A205871 #8 Mar 30 2012 18:58:12 %S A205871 18,29,41,60,65,71,76,78,86,111,121,129,140,168,173,195,200,202,203, %T A205871 211,219,227,242,254,262,270,275,277,285,293,298,300,302,320,328,332, %U A205871 355,369,383,388,390,391,399,412,422,438,442,462,473,479,497,505 %N A205871 Positions of multiples of 9 in A204922 (differences of Fibonacci numbers). %C A205871 For a guide to related sequences, see A205840. %e A205871 In A204922=(1,2,1,4,3,2,7,6,5,3,12,11,...), multiples %e A205871 of 9 are in positions 18,29,41,... See the example at %e A205871 A205872. %t A205871 (See the program at A205872.) %Y A205871 Cf. A204890, A205872, A205840. %K A205871 nonn %O A205871 1,1 %A A205871 _Clark Kimberling_, Feb 02 2012