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 A046037 #10 Feb 16 2025 08:32:38 %S A046037 8,9,10,11,12,13,14,15,16,17,18,19,20,23,24,25,26,27,28,29,30,31,32, %T A046037 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55, %U A046037 56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78 %N A046037 Numbers n for which floor((3/2)^n) is composite. %D A046037 R. K. Guy, Unsolved Problems in Number Theory, E19. %H A046037 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FloorFunction.html">Floor Function</a> %t A046037 Select[Range[100],CompositeQ[Floor[(3/2)^#]]&] (* _Harvey P. Dale_, Sep 23 2014 *) %o A046037 (PARI) is(n)=n>7&&!isprime(floor(1.5^n)) \\ _Charles R Greathouse IV_, Oct 27 2011 %K A046037 nonn %O A046037 1,1 %A A046037 _Eric W. Weisstein_