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 A283485 #16 Apr 03 2023 10:36:13 %S A283485 4,5,7,11,13,23,25,31,33,37,59,63,91,157,265,267,327,539,555,621,715, %T A283485 921,979,1633,1821,2259,2697,2809,2863,2935,4213,4351,5937,6885,8743, %U A283485 10761,15159,17685,52075,55147,68677,99655 %N A283485 Numbers k such that k![6]-2 is prime, where k![6] = A085158 (k) = sextuple factorial. %C A283485 a(43) > 10^5. %C A283485 The first 10 primes associated with this sequence: 2, 3, 5, 53, 89, 21503, 43223, 1339973, 7577953, 49579073. %H A283485 C. Caldwell and H. Dubner (Eds): <a href="https://t5k.org/lists/top_ten/">The top ten prime numbers: from the unpublished collections of R. Ondrejka</a> (May 2001), Table 21 F, p. 75 %H A283485 Ken Davis, <a href="http://mfprimes.free-dc.org">Status of Search for Multifactorial Primes</a>. %t A283485 MultiFactorial[n_, k_] := If[n < 1, 1, n*MultiFactorial[n - k, k]]; %t A283485 Select[Range[2, 50000], PrimeQ[MultiFactorial[#, 6] - 2] &] %t A283485 Select[Range[100000],PrimeQ[Times@@Range[#,1,-6]-2]&] (* _Harvey P. Dale_, Feb 23 2023 *) %Y A283485 Cf. A076185, A085158, A094144, A204657. %K A283485 nonn %O A283485 1,1 %A A283485 _Robert Price_, Mar 08 2017 %E A283485 a(39)-a(42) from _Robert Price_, Jul 09 2017