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 A079347 #12 Aug 09 2025 16:37:26 %S A079347 3,4,5,8,10,18,24,30,44,58,68,70,78,84,104,128,130,164,168,178,190, %T A079347 224,228,238,250,270,284,310,358,368,378,384,418,430,438,444,464,468, %U A079347 478,488,490,498,504,524,548,570,588,598,608,630,644,648,658,684,718,728,738,750 %N A079347 Fibonacci(p-(p/5)) is the first Fibonacci number that p divides and this is p-(p/5). %H A079347 Amiram Eldar, <a href="/A079347/b079347.txt">Table of n, a(n) for n = 1..10000</a> %e A079347 a(4) = 8 because A079346(4) = 7, (7/5) = -1 and 7-(-1) = 8. %o A079347 (PARI) forprime (p=2, 500, wss=p-kronecker(5, p); for(n=1, wss, if( fibonacci(n)%p==0, if( n==wss, print1(wss", "), break) ) )) %Y A079347 Cf. A079346, A079348, A079349, A262708. %K A079347 nonn %O A079347 1,1 %A A079347 _Jon Perry_, Jan 04 2003 %E A079347 Offset corrected and a(1)-a(3) and more terms added by _Amiram Eldar_, Jun 22 2024