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 A070758 #16 Feb 16 2025 08:32:46 %S A070758 25,38,57,86,129,194,291,437,656,985,1477,2216,3325,11222,16834,25251, %T A070758 37876,56815,85222,127834,191751,287626,431439,647159,970739,1456109, %U A070758 2184164,3276246,4914369,7371554,11057332,16585998,24878997,37318496 %N A070758 Values of floor((3/2)^n) that are composite. %D A070758 R. K. Guy, Unsolved Problems in Number Theory, E19 %H A070758 Robert Israel, <a href="/A070758/b070758.txt">Table of n, a(n) for n = 1..5649</a> %H A070758 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PowerFloors.html">Power Floors</a> %p A070758 remove(isprime, [seq(floor((3/2)^n),n=2..100)]); # _Robert Israel_, Oct 30 2019 %t A070758 Select[Floor[(3/2)^Range[50]],CompositeQ] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, May 11 2017 *) %Y A070758 Cf. A070759, A067904. %Y A070758 Composites in A002379. %K A070758 nonn %O A070758 1,1 %A A070758 _Eric W. Weisstein_, May 04 2002