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 A216754 #15 Aug 27 2015 08:40:28
%S A216754 0,1,1,7,9,4,1,4,9,7,1,1,9,1,1,7,9,4,1,4,9,7,1,1,9,1,1,7,9,4,1,4,9,7,
%T A216754 1,1,9,1,1,7,9,4,1,4,9,7,1,1,9,1,1,7,9,4,1,4,9,7,1,1,9,1,1,7,9,4,1,4,
%U A216754 9,7,1,1,9,1,1,7,9,4,1,4,9,7,1,1,9,1,1,7,9,4,1,4,9,7,1,1,9,1,1,7,9,4,1,4,9,7,1,1,9
%N A216754 Digital root of fourth power of Fibonacci numbers.
%C A216754 This sequence is periodic with period 12. Also, the first (2n - 1) terms are symmetric about n-th term, where n = 6k, k = 1, 2, 3, ...
%H A216754 <a href="/index/Rec#order_12">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
%t A216754 Table[NestWhile[Total[IntegerDigits[#]] &, Fibonacci[n]^4, # > 9 &], {n, 0, 86}] (* _T. D. Noe_, Oct 15 2012 *)
%t A216754 Join[{0},LinearRecurrence[{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},{1, 1, 7, 9, 4, 1, 4, 9, 7, 1, 1, 9},108]] (* _Ray Chandler_, Aug 27 2015 *)
%Y A216754 Cf. A004090, A216676, A216699.
%K A216754 nonn,base,easy
%O A216754 0,4
%A A216754 _Ravi Bhandari_, Sep 15 2012
%E A216754 Extended by _Ray Chandler_, Aug 27 2015