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 A095214 #15 Sep 08 2022 08:45:13 %S A095214 1,2,4,10,24,54,120,266,593,1317,2926,6501,14441,32081,71266,158315, %T A095214 351688,781255,1735512,3855339,8564410,19025337,42263673,93886277, %U A095214 208562871,463310210,1029216515,2286344247,5078979923,11282656623 %N A095214 a(n) = floor((Pi/sqrt(2))^n). %H A095214 Vincenzo Librandi, <a href="/A095214/b095214.txt">Table of n, a(n) for n = 0..1000</a> %t A095214 Floor[(Pi/Sqrt[2])^Range[0,30]] (* _Harvey P. Dale_, May 12 2014 *) %o A095214 (PARI) vector(30, n, n--; floor((Pi/sqrt(2))^n)) \\ _G. C. Greubel_, Sep 27 2018 %o A095214 (Magma) R:= RealField(20); [Floor((Pi(R)/Sqrt(2))^n): n in [0..30]]; // _G. C. Greubel_, Sep 27 2018 %Y A095214 Cf. A247719 (Pi/sqrt(2)). %K A095214 nonn,easy %O A095214 0,2 %A A095214 _Jason Earls_, Jun 22 2004