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 A336481 #19 Sep 02 2020 14:38:03
%S A336481 1,1,1,1,1,11,19,19,29,19,1,1,97,41,23,131,107,53,101,529,53,269,347,
%T A336481 97,317,97,353,73,97,193,71,1543,661,257,193,191,151,443,167,967,251,
%U A336481 2441,163,151,379,229,127,59,1223,911,389,349,919,179,1051,167,547,541
%N A336481 a(n) is the smallest positive k such that Fibonorial(n) - k is a prime, for n>3.
%e A336481 For n=5, a(5) = Fibonorial(5) - 1 = 30 - 1 = 29 is a prime.
%t A336481 Table[(Fibonorial[n]-NextPrime[Fibonorial[n],-1]),{n,4,50}]
%o A336481 (PARI) f(n) = prod(i=1, n, fibonacci(i)); \\ A003266
%o A336481 a(n) = my(fn=f(n)); fn - precprime(fn-1); \\ _Michel Marcus_, Jul 23 2020
%Y A336481 Cf. A003266, A059709 (locations of 1's), A336480.
%K A336481 nonn
%O A336481 4,6
%A A336481 _Mohamed Sami Gattoufi_, Jul 22 2020