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 A030799 #11 Aug 19 2020 11:27:23 %S A030799 1,3,9,39,197,1187,8309,66476,598287,5982879,65811677,789740126, %T A030799 10266621646,143732703044,2155990545670,34495848730735, %U A030799 586429428422497,10555729711604956,200558864520494172,4011177290409883459 %N A030799 a(n) = floor(exp(1/2)*n!). %H A030799 Robert Israel, <a href="/A030799/b030799.txt">Table of n, a(n) for n = 1..449</a> %F A030799 a(n+1) = (n+1)*a(n) + A068453(n+1). - _Robert Israel_, Oct 16 2019 %p A030799 f:= n -> floor(exp(1/2)*n!): %p A030799 map(f, [$1..30]); # _Robert Israel_, Oct 16 2019 %t A030799 Floor[Exp[1/2]Range[20]!] (* _Harvey P. Dale_, Aug 19 2020 *) %Y A030799 Cf. A068453. %K A030799 nonn %O A030799 1,2 %A A030799 _Simon Plouffe_