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 A179532 #18 Sep 08 2022 08:45:54
%S A179532 1,2,4,16,128,1024,16384,524288,16777216,1073741824,137438953472,
%T A179532 17592186044416,4503599627370496,2305843009213693952,
%U A179532 1180591620717411303424,1208925819614629174706176,2475880078570760549798248448
%N A179532 a(n) = 2^ceiling(n*(n+1)/3).
%C A179532 Hankel transform of A128750. Satisfies (4,0) Somos-4 recurrence 4*a(n-1)*a(n-3)/a(n-4) = a(n),n>3.
%H A179532 G. C. Greubel, <a href="/A179532/b179532.txt">Table of n, a(n) for n = 0..99</a>
%F A179532 2^A007980.
%F A179532 a(n) = a(-1-n) for all n in Z. - _Michael Somos_, Aug 14 2018
%t A179532 Table[2^Ceiling[(n(n+1))/3],{n,0,20}] (* _Harvey P. Dale_, Sep 25 2013 *)
%o A179532 (PARI) vector(20,n,n--; 2^ceil(n*(n+1)/3)) \\ _G. C. Greubel_, Aug 14 2018
%o A179532 (Magma) [2^Ceiling((n(n+1))/3): n in [0..20]]; // _G. C. Greubel_, Aug 14 2018
%K A179532 nonn
%O A179532 0,2
%A A179532 _Paul Barry_, Jan 08 2011