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 A212457 #22 Jan 20 2024 11:27:40
%S A212457 5,16,29,44,59,76,93,110,129,147,166,185,205,225,245,266,286,307,329,
%T A212457 350,372,394,416,438,460,483,505,528,551,574,597,621,644,668,691,715,
%U A212457 739,763,787,812,836,860,885,910,934
%N A212457 a(n) = floor(4n*log(4n)).
%H A212457 Vincenzo Librandi, <a href="/A212457/b212457.txt">Table of n, a(n) for n = 1..1000</a>
%t A212457 Table[Floor[4*n*Log[4*n]], {n, 80}] (* _Vincenzo Librandi_, Feb 13 2013 *)
%o A212457 (Derive) PROG(y := [], x := 100, LOOP(IF(x = 0, RETURN y), y := ADJOIN(FLOOR(4·x·LOG(4·x)), y), x := x - 1))
%o A212457 (Magma) [Floor(4*n*Log(4*n)): n in [1..80]]; // _Vincenzo Librandi_, Feb 13 2013
%o A212457 (PARI) a(n)=4*n*log(4*n)\1 \\ _Charles R Greathouse IV_, Sep 04 2015
%Y A212457 Cf. A050502, A050504, A212455, A212456, A212458, A212459, A212460, A212461, A212462.
%K A212457 easy,nonn
%O A212457 1,1
%A A212457 _Mohammad K. Azarian_, May 31 2012