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 A324467 #15 Sep 08 2022 08:46:24
%S A324467 0,3,3,6,3,6,6,9,3,6,6,9,6,9,9,12,3,6,6,9,6,9,9,12,6,9,9,12,9,12,12,
%T A324467 15,3,6,6,9,6,9,9,12,6,9,9,12,9,12,12,15,6,9,9,12,9,12,12,15,9,12,12,
%U A324467 15,12,15,15,18,3,6,6,9,6,9,9,12,6,9,9,12,9,12,12,15,6,9,9,12
%N A324467 Three times the binary weight of n: 3*A000120(n).
%C A324467 Exponent of highest power of 2 that divides multinomial(4*n;n,n,n,n).
%H A324467 Vincenzo Librandi, <a href="/A324467/b324467.txt">Table of n, a(n) for n = 0..8191</a>
%p A324467 [seq(padic[ordp](multinomial(4*n,n,n,n,n),2),n=0..128)];
%t A324467 3 Log[2, Nest[Join[#, 2 #]&, {1}, 8]] (* _Vincenzo Librandi_, Mar 11 2019 *)
%o A324467 (Magma) [3*Valuation(Binomial(2*n,n), 2): n in [0..120]]; // _Vincenzo Librandi_, Mar 11 2019
%Y A324467 Cf. A000120, A006480, A324465, A324466.
%K A324467 nonn
%O A324467 0,2
%A A324467 _N. J. A. Sloane_, Mar 02 2019