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 A219639 #10 Dec 30 2012 04:02:43 %S A219639 1,5,8,13,17,21,25,28,34,38,41,46,50,55,59,62,67,71,75,79,82,89,93,96, %T A219639 101,105,109,113,116,122,126,129,134,138,144,148,151,156,160,164,168, %U A219639 171,177,181,184,189,193,198,202,205,210,214,218,222,225,233,237,240 %N A219639 Numbers that occur only once in A219641. %C A219639 Fibonacci numbers, A000045(i) from i>=5 onward, 5, 8, 13, 21, ..., all occur in this sequence, as well as these numbers plus 2: 7, 10, 15, 23, all have Zeckendorf-expansions with just two 1's and end with ...010. %H A219639 A. Karttunen, <a href="/A219639/b219639.txt">Table of n, a(n) for n = 1..10000</a> %F A219639 a(n) = A219641(A035336(n)). %Y A219639 Cf. A219637. %K A219639 nonn %O A219639 1,2 %A A219639 _Antti Karttunen_, Nov 24 2012