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 A053408 #33 Feb 16 2025 08:32:42 %S A053408 1,2,3,4,5,6,7,8,22,28 %N A053408 Numbers k such that A003266(k) + 1 is prime. %C A053408 Next term > 300. - _Joerg Arndt_, Aug 16 2014 %C A053408 The corresponding primes are given in A053413. - _Joerg Arndt_, Aug 17 2014 %C A053408 If it exists, a(11) > 1100. - _Robert Price_, May 27 2019 %H A053408 C. K. Caldwell, <a href="https://t5k.org/glossary/page.php?sort=FibonacciNumber">Fibonacci Numbers</a> %H A053408 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FibonacciNumber.html">Fibonacci Number.</a> %H A053408 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Fibonorial.html">Fibonorial</a> %t A053408 Select[Range[30], PrimeQ[Fibonorial[#] + 1] &] (* _Robert Price_, May 26 2019 *) %o A053408 (PARI) ff(n)=prod(i=1, n, fibonacci(i)); %o A053408 for(n=1,10^6, if(ispseudoprime(ff(n)+1), print1(n,", "))); \\ _Joerg Arndt_, Aug 16 2014 %Y A053408 Cf. A000040, A000045, A003266, A053412, A053413, A059709. %K A053408 nonn,more %O A053408 1,2 %A A053408 _G. L. Honaker, Jr._, Jan 08 2000 %E A053408 Definition edited by _Daniel Forgues_, Nov 29 2009 %E A053408 Edited definition, _Joerg Arndt_, Aug 17 2014