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 A254403 #4 Jan 30 2015 06:35:02
%S A254403 4,8,22,107,1116,37315,7208411,19353494040,2692396855225368,
%T A254403 139703926313910081688758,52217120356716278672533411477879775,
%U A254403 11932168478692303941858114447713697732545410824169841
%N A254403 a(n) = floor(b(n)), where b(n) = b(n-1)^(3/2), b(1) = 4.
%F A254403 a(n) = floor(4^((3/2)^(n-1))).
%t A254403 Floor[RecurrenceTable[{a[1]==4,a[n]==a[n-1]^(3/2)},a,{n,1,15}]]
%t A254403 Table[Floor[4^((3/2)^(n-1))], {n, 1, 15}]
%Y A254403 Cf. A254404.
%K A254403 nonn,easy
%O A254403 1,1
%A A254403 _Vaclav Kotesovec_, Jan 30 2015