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 A254405 #4 Jan 30 2015 06:34:45
%S A254405 2,5,76,50535,574095583180,249724133031150566792019567784,
%T A254405 31163862905284344117664280692583318559734023853854503847082621442686494830
%N A254405 a(n) = floor(b(n)), where b(n) = b(n-1)^(5/2), b(1) = 2.
%F A254405 a(n) = floor(2^((5/2)^(n-1))).
%t A254405 Floor[RecurrenceTable[{a[1]==2,a[n]==a[n-1]^(5/2)},a,{n,1,10}]]
%t A254405 Table[Floor[2^((5/2)^(n-1))], {n, 1, 10}]
%Y A254405 Cf. A254406.
%K A254405 nonn,easy
%O A254405 1,1
%A A254405 _Vaclav Kotesovec_, Jan 30 2015