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 A037083 #30 Mar 19 2025 10:21:30 %S A037083 0,1,2,4,5,6,7,9,10,11,17,24,29,39,40,57,58,59,91,155,175,245,359,372, %T A037083 597,864,977,1077,1327,2076,4798,4975,10830,13453,15472,15948,16116, %U A037083 16681,18037,21725,22326,24753,28565,32659,46487,50649,51393,80069,95493 %N A037083 Numbers k such that k!!! + 1 is prime (0 is included by convention). %C A037083 n!!! = n*(n-3)*(n-6)*(n-9)*... %C A037083 The search for multifactorial primes started by Ray Ballinger is now continued by a team of volunteers on the website of Ken Davis (see link). %H A037083 Ray Ballinger, <a href="http://web.archive.org/web/20160604135248/http://www.prothsearch.net/multifac.html">Status of Search for Multifactorial Primes</a> %H A037083 Ken Davis, <a href="http://mfprimes.free-dc.org">Status of Search for Multifactorial Primes.</a> %H A037083 Ken Davis, <a href="http://mfprimes.free-dc.org/mfdata/f03p.html">Results for n!3+1.</a> %H A037083 Shyam Sunder Gupta, <a href="https://doi.org/10.1007/978-981-97-2465-9_16">Fascinating Factorials</a>, Exploring the Beauty of Fascinating Numbers, Springer (2025) Ch. 16, 411-442. %H A037083 <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a> %Y A037083 Cf. A007661 (triple factorials), A084438, A037082. %K A037083 nonn %O A037083 1,3 %A A037083 _G. L. Honaker, Jr._ %E A037083 More terms from _Steven Harvey_ %E A037083 Corrected and extended by _Hugo Pfoertner_, Jun 25 2003 %E A037083 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008 %E A037083 Edited by _N. J. A. Sloane_, Jan 14 2008