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 A071373 #13 Jul 15 2024 03:29:51 %S A071373 2,3,4,6,6,18362,2914913,10780552,1829413731,1676641682, %T A071373 21487725800101,22755817971366481,107271326364325201, %U A071373 7272877497848202226 %N A071373 Least number X such that the numbers from X to X+n-1 are, in some order, 1 * a prime, 2 * a prime, ..., n * a prime. %e A071373 a(7)=2914913 because 2914913=1*2914913, 2914914=6*485819, 2914915=5*582983, 2914916=4*728729, 2914917=3*971639, 2914918=2*1457459 and 2914919=7*416417. The left factors are the integers 1 to 7; and the right factors are primes. %Y A071373 Cf. A071367-A071372. %K A071373 nonn,more %O A071373 1,1 %A A071373 _Don Reble_, May 21 2002 %E A071373 a(13)-a(14) from _Don Reble_, Sep 10 2012 %E A071373 a(4) and a(5) corrected by _Sean A. Irvine_, Jul 14 2024