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 A004691 #14 Sep 08 2022 08:44:33 %S A004691 0,1,1,2,3,5,10,15,25,42,67,131,220,351,571,1142,1733,3075,5030,10125, %T A004691 15155,25302,42457,67761,132440,222421,355061,577502,1154563,1754265, %U A004691 3131050,5105335,10236405,15343742 %N A004691 Fibonacci numbers written in base 8. %H A004691 Vincenzo Librandi, <a href="/A004691/b004691.txt">Table of n, a(n) for n = 0..1000</a> %t A004691 FromDigits[IntegerDigits[#, 8]] & / @ Fibonacci[Range[0, 40]] (* _Vincenzo Librandi_, Jun 08 2013 *) %o A004691 (PARI) vector(50, n, n--; fromdigits(digits(fibonacci(n), 8))) \\ _G. C. Greubel_, Oct 09 2018 %o A004691 (Magma) [Seqint(Intseq(Fibonacci(n),8)): n in [0..50]]; // _G. C. Greubel_, Oct 09 2018 %Y A004691 CF. A000045 (Fibonacci), A007094 (numbers in base 8). %K A004691 nonn,base,easy %O A004691 0,4 %A A004691 _N. J. A. Sloane_