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 A261606 #13 Feb 16 2025 08:33:26 %S A261606 0,1,1,2,3,5,8,13,21,34,55,29,24,53,17,10,27,37,4,41,45,26,11,37,48, %T A261606 25,13,38,51,29,20,49,9,58,7,5,12,17,29,46,15,1,16,17,33,50,23,13,36, %U A261606 49,25,14,39,53,32,25,57,22,19,41,0,41,41,22,3,25,28,53 %N A261606 a(n) = Fibonacci(n) mod 60. %C A261606 a(n) = A261575(n,0). %C A261606 Periodic with period length 120. - _Ray Chandler_, Sep 23 2015 %H A261606 Reinhard Zumkeller, <a href="/A261606/b261606.txt">Table of n, a(n) for n = 0..10000</a> %H A261606 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Sexagesimal.html">Sexagesimal</a> %H A261606 Wikipedia, <a href="http://www.wikipedia.org/wiki/Sexagesimal">Sexagesimal</a> %F A261606 a(0) = 0, a(1) = 1 and for n > 1: a(n) = (a(n-1) + a(n-2)) mod 60. %t A261606 Mod[Fibonacci[Range[67]], 60] (* _Michael De Vlieger_, Jan 22 2022 *) %o A261606 (Haskell) %o A261606 a261606 n = a261606_list !! n %o A261606 a261606_list = 0 : 1 : map (flip mod 60) %o A261606 (zipWith (+) a261606_list $ tail a261606_list) %o A261606 (PARI) a(n) = fibonacci(n) % 60; \\ _Michel Marcus_, Jan 22 2022 %Y A261606 Cf. A000045, A261575, A261607, A003893. %K A261606 nonn,base %O A261606 0,4 %A A261606 _Reinhard Zumkeller_, Sep 09 2015