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 A262548 #3 Oct 06 2015 14:13:56 %S A262548 1,1,1,5,273,2982616,1830034134296583, %T A262548 4219771415190209120329546223112205, %U A262548 159545978336249166974717516821935499136450045008874233960892835107904996 %N A262548 Nearest integer to 2^(2^(n-1))/(2*n!). %H A262548 R. F. Wheeler, <a href="/A002543/a002543_2.pdf">An asymptotic formula for the number of complete propositional connectives</a>, Z. Math. Logik Grundlagen Math. 8 (1962), 1-4. [Annotated scanned copy] %Y A262548 An approximation to A262546. %K A262548 nonn %O A262548 1,4 %A A262548 _N. J. A. Sloane_, Oct 06 2015