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 A017940 #17 Sep 08 2022 08:44:43 %S A017940 1,3,12,41,144,498,1728,5985,20736,71831,248832,861979,2985984, %T A017940 10343751,35831808,124125023,429981696,1489500287,5159780352, %U A017940 17874003451,61917364224,214488041413,743008370688 %N A017940 Powers of sqrt(12) rounded down. %H A017940 Vincenzo Librandi, <a href="/A017940/b017940.txt">Table of n, a(n) for n = 0..900</a> %F A017940 a(n) = floor(sqrt(12^n)). - _Vincenzo Librandi_, Jun 24 2011 %t A017940 Floor[(Sqrt[12])^Range[0,30]] (* _Harvey P. Dale_, Aug 26 2019 *) %o A017940 (Magma) [Floor(Sqrt(12^n)): n in [0..30]]; // _Vincenzo Librandi_, Jun 24 2011 %o A017940 (PARI) a(n)=sqrtint(12^n) \\ _Charles R Greathouse IV_, Nov 18 2011 %Y A017940 Cf. A010469 (sqrt(12)). %K A017940 nonn %O A017940 0,2 %A A017940 _N. J. A. Sloane_