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 A216756 #16 Feb 16 2025 08:33:18
%S A216756 2,5,21,219,12686,15636041,4101615513409,12983864742986180266005,
%T A216756 588668718546098799238432431873920456606,
%U A216756 93859726557327916653208320240553220872245170780539985934198524439788
%N A216756 a(n) = floor(e^e^(n/e^gamma)).
%C A216756 Assuming the Riemann hypothesis we have a(n) < A134716(n) for n >= 4.
%H A216756 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/RobinsTheorem.html">Robin's Theorem</a>
%e A216756 a(3) = 219 because exp(exp(n/exp(gamma))) = 219.0062568829....
%t A216756 Table[Floor[E^E^(n/E^EulerGamma)], {n, 0, 9}]
%o A216756 (Magma) [Floor(Exp(Exp(n/Exp(EulerGamma(RealField(100)))))) : n in [0..9]];
%Y A216756 Cf. A001620, A134716, A058210.
%K A216756 nonn
%O A216756 0,1
%A A216756 _Arkadiusz Wesolowski_, Sep 15 2012