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 A076688 #24 Aug 28 2020 03:25:52
%S A076688 1,8,1024,33554432,72057594037927936,
%T A076688 664613997892457936451903530140172288,
%U A076688 113078212145816597093331040047546785012958969400039613319782796882727665664
%N A076688 a(n) = 2^(2^n-n-2).
%C A076688 Integer values of 1/(2-Sum_{i=1..m} i/2^i).
%C A076688 The next term a(9) has 151 digits, and is too large to include in data. - _Bernard Schott_, Aug 27 2020
%p A076688 Data := [seq(2^(2^n-n-2), n = 2..8)]; \\ _Bernard Schott_, Aug 26 2020
%t A076688 Table[2^(2^n - n - 2), {n, 2, 8}] (* _Amiram Eldar_, Aug 27 2020 *)
%Y A076688 Cf. A036799.
%Y A076688 Subsequence of A289585.
%Y A076688 Cf. A000225, A020491, A058891.
%K A076688 nonn
%O A076688 2,2
%A A076688 _Benoit Cloitre_, Oct 25 2002